At Ferny Grove overnight temperatures were above average and were the highest in 10 years. Daytime temperatures were well above average. In the Brisbane area the official sites measured above average mean minimum temperatures and above average daytime temperatures which were well above average at some locations. Rainfall at Ferny Grove was well above average and the highest in 5 years. Most of the official sites in the Brisbane area measured close to or well above the long term average. In summer at Ferny Grove air pressure was below average, mean, mean minimum and mean maximum relative humidity was near average, mean, mean minimum and mean maximum dew point was close to average, above average wind speed and 20 thunderstorms (22 thunder days).
Seasonal Mean Minimum Temperature: 20.9 ºC, 0.9 ºC above average and 0.5 ºC higher than the same season in 2018-19. This is the second highest seasonal minimum temperature on record for summer and the highest since the current record high of 21.8 ºC in 2009-10. During summer mean minimum temperatures as observed by the official sites in the Brisbane area were above average. Many sites especially the inland sites saw mean minimum temperatures that were 1 ºC above average. The lowest anomaly was 0.6 ºC above average at Beerburrum (mean minimum temperature of 20 ºC). Point Lookout (22.9 ºC) and Redcliffe (22.5 ºC) were 0.7 ºC above average, whilst all the remaining sites were between 1.1 ºC and 1.4 ºC above average. The highest anomaly of 1.4 ºC above average was observed by Archerfield (21.3 ºC), Beaudesert (20.2 ºC) and Gatton (20.1 ºC). The highest mean minimum temperature observed was 22.9 ºC at Point Lookout (0.7 ºC above average) and the lowest mean minimum temperature was 18.7 ºC at Canungra. Brisbane observed a mean minimum temperature of 22.2 ºC (1.1 ºC above average). A new record was set for the highest mean daily minimum temperature at Archerfield exceeding the previous record by 0.1 ºC and Amberley and Gatton saw mean minimum temperatures that were the highest in at least 20 years.
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Lowest Monthly Mean Minimum Temperature (December): 19.6 ºC, 0.6 ºC above average and 0.1 ºC higher than same month in 2018. This is the third highest on record for December and the highest since 20 ºC in 2014. During December in the Brisbane area mean minimum temperatures were above average at most sites and close to average at some sites and these were mostly some of the inland sites. The sites that were above average saw mean minimum temperatures that were between 0.7 ºC (Point Lookout with a mean minimum temperature of 22.1 ºC and Redcliffe with a mean minimum temperature of 21.7 ºC) and 1 ºC above average (Cape Moreton Lighthouse with a mean minimum temperature of 22 ºC). The highest mean minimum temperature was 22 ºC at Cape Moreton Lighthouse, whilst the lowest mean minimum temperature was 16.7 ºC at Canungra. The lowest anomaly from the long-term average was 0.1 ºC below average observed at Amberley with a mean minimum temperature of 34.6 ºC. Brisbane observed a mean minimum temperature of 21.2 ºC (0.8 ºC above average).
Highest Monthly Mean Minimum Temperature (January): 21.9 ºC, 1.2 ºC above average and 1.1 ºC higher than same month in 2019. This is the second highest on record for January and the highest since the current record high of 22.9 ºC in 2010. All of the official sites in the Brisbane area observed above average mean minimum temperatures with most sites of least 1 ºC above average. The lowest mean minimum temperature observed of all the sites was 19.5 ºC at Canungra and the lowest anomaly from the long term average was 0.7 ºC above at Redcliffe with a mean minimum temperature of 23 ºC. The only other site of less than 1 ºC above average was 20.6 ºC at Beerburrum. The highest mean minimum temperature was 23.7 ºC at Point Lookout (1.1 ºC above average). The highest anomalies from the long term average was observed at the inland sites. The highest anomaly from the long term average was 1.9 ºC above average at Archerfield, followed by 1.7 ºC above average at Amberley (21.3 ºC) and Gatton was 1.6 ºC above average (20.7 ºC). Brisbane observed a mean minimum temperature of 23.1 ºC (1.5 ºC above average). In addition to above average daytime temperature some sites saw record high mean minimum temperatures for January at Brisbane and Brisbane Aero. Amberley measured the equal highest for January since 21.3 ºC in 1987 and Archerfield saw the highest since 22.4 ºC in 1994.
Monthly Mean Minimum Temperature for February: 21.2 ºC, 0.9 ºC above average and 0.3 ºC higher than same month in 2019. This is the second highest on record for February and the highest since the current record high of 21.4 ºC in 2010. Most of the official sites in the Brisbane area observed above average or well above average mean minimum temperatures that were at least 1 ºC above average. The exception to this was Point Lookout at 0.3 ºC above average with a mean minimum temperature of 22.9 ºC, Brisbane at 0.9 ºC above average (22.3 ºC) and Redcliffe at 0.8 ºC above average (22.7 ºC). The remaining sites were between 1.1 ºC above average (at Brisbane Aero with a mean minimum temperature of 22.3 ºC and Cape Moreton Lighthouse with a mean minimum temperature of 23.1 ºC) and 2.1 ºC above average at Beaudesert (21.1 ºC). The inland sites saw mean minimum temperatures that were near or at 2 ºC above average. The highest mean minimum temperature was 22.9 ºC at Point Lookout and the lowest was 20 ºC at Canungra. Due to persistent cloud coverage during February Archerfield, Logan City Water Treatment Plant and Beerburrum measured record high mean minimum temperatures. Amberley and Gatton observed the highest mean minimum temperature since 1981.
Seasonal Mean Maximum Temperature: 31.9 ºC, 1.7 ºC above average and 0.7 ºC higher than the same season in 2018-19. This is the third highest on record and the highest since the current record high of 33.1 ºC in 2016-17. All of the official sites in the Brisbane area observed above average mean maximum temperatures of around 1 ºC above average and up to 2 ºC above average were observed by the inland site. The mean minimum temperature closest to the long term average was 0.6 ºC above average at Brisbane Aero (a mean maximum temperature of 29.4 ºC). The coastal sites saw mean minimum temperatures that were up to 1.3 ºC above average at most sites, whilst the inland sites were between 1.4 ºC and 2.5 ºC above average. The sites that were near 2 ºC above average were Amberley at 2 ºC above average (32.8 ºC), Beaudesert at 1.4 ºC above average (31.4 ºC) and Gatton was 2.5 ºC above average which was the highest observed mean maximum temperature. The lowest mean maximum temperature was at Cape Moreton Lighthouse of 28.8 ºC (2.1 ºC above average). Brisbane observed a mean maximum temperature of 30.9 (0.9 ºC above average).
Lowest Monthly Mean Maximum Temperature (February): 30.4 ºC, 0.5 ºC above average and 0.8 ºC lower than same month in 2019. This is the fifth lowest on record for February and the lowest since 29.7 ºC in 2015. Mean maximum temperatures in the Brisbane area during February were close to average at all of the sites except for 1.8 ºC above average at Cape Moreton Lighthouse (28.7 ºC). Of the remaining sites that were close to average the highest anomaly above the long term average was 0.3 ºC above average at Amberley (30.8 ºC) and the greatest anomaly below the long term average was 0.4 ºC below average at Logan City Treatment Plant (29.1 ºC). The highest mean maximum temperature of all the official sites was 31 ºC at Gatton (0.2 ºC above average) whilst the lowest observed was 28.6 ºC at Redland (Alexandra Hills). Brisbane observed a mean maximum temperature of 29.9 ºC which was 0.3 ºC below the long term average.
Highest Monthly Mean Maximum Temperature (December): 33 ºC, 3.0 ºC above average and 2.6 ºC higher than same month in 2018. This is the highest on record for December, exceeding the previous record high of 32.2 ºC in 2009. During December all official sites in the Brisbane area measured above to well above mean maximum temperatures that was at least 1 ºC above average and 3 ºC to 4 ºC above average at the inland sites. Five of these official sites equalled or exceeded records for December mean maximum temperatures. For Gatton and Amberley these temperatures exceeded the previous record set in 1953 and 1957 respectively. The lowest mean maximum temperature of the official sites was 28.5 ºC at Cape Moreton Lighthouse (2.3 ºC above average). Except for the inland sites mean maximum temperatures ranged between 1.3 ºC above average at Brisbane Aero (29.5 ºC) and 2.9 ºC above average at Beerburrum (32.6 ºC). The highest mean maximum temperature was 4.4 ºC above average at Gatton (35.7 ºC) which also observed the highest anomaly from the long-term average. The other inland measured significantly high mean maximum temperatures of 34.6 ºC at Amberley (3.8 ºC above average), 32.5 ºC at Archerfield (2.9 ºC above average) and 34.7 ºC at Beaudesert (4.3 ºC above average). Brisbane observed a mean maximum temperature of 31.9 ºC (2.4 ºC above average).
Monthly Mean Maximum Temperature for January: 32.2 ºC, 1.6 ºC above average and 0.2 ºC higher than same month in 2019. This is the fifth highest on record for January and the highest since 32.9 ºC in 2018. All of the official sites in the Brisbane area observed above average to well above average mean maximum temperatures in January of around 1 ºC above average at coastal locations and 2 ºC to 3 ºC at the inland sites. The site measuring mean maximum temperature closest to the long term average was Brisbane at 0.4 ºC above average with a mean maximum temperature of 30.9 ºC. Redcliffe (29.8 ºC ) and Brisbane Aero (29.7 ºC) at 0.6 ºC above average and Point Lookout at 0.9 C above average (30.5 ºC) were the remaining sites that measured mean maximum temperatures that were less than 1 ºC above average. The lowest mean maximum temperature was 29.3 ºC at Redland (Alexandra Hills). The highest anomaly above the long term average was 3.2 ºC above average at Gatton (34.8 ºC). The other inland sites saw mean maximum temperatures that were 1 ºC above average at Archerfield (31.5 ºC), Beaudesert was 1.5 ºC above average (33 ºC) and Amberley was 2 ºC above average (33.2 ºC). The remaining coastal sites saw mean maximum temperatures that were near 1 ºC above average.
Seasonal Mean Temperature: 26.4 ºC, 0.7 ºC above average and 0.6 ºC higher than same season in 2018-19. This is the third highest on record and the highest since the current record high of 26.7 ºC in 2016-17.
Lowest Mean Monthly Temperature (February): 25.8 ºC, 0.7 ºC above average and 0.2 ºC lower than same month in 2019. This is the fourth highest on record for January and the lowest since 25.1 ºC in 2018.
Highest Mean Monthly Temperature (January): 27 ºC, 1.4 ºC above average and 0.6 ºC higher than same month in 2019. This is the fourth highest on record for January and the highest since the current record high of 27.3 ºC in 2017. Gatton observed a mean temperature of 27.8 ºC being the highest since 28.5 ºC in 1942 (a more recent record may gone unreported) and Amberly observed the equal highest mean temperature of 27.2 ºC since 27.2 ºC in 1987.
Mean Monthly Temperature (December): 26.3 ºC, 1.8 ºC above average and 1.4 ºC higher than same month in 2018. This is the second highest on record for December and the highest since the current record high of 26.4 ºC in 2009.
Lowest Temperature: 14.4 ºC on 4 December 2019 at 4:59 AM. Same month in 2018 and the same season in 2018-19 was 14.9 ºC. This is the fourth highest monthly minimum temperature for December on record, the ninth lowest daily minimum temperature for December and the lowest since 13.8 ºC in 2017 on 6 December at 5:20 AM. For summer this is the fourth highest seasonal minimum temperature on record, the lowest since 13.8 ºC in 2017-18 on 15 January at 5:41 AM, the eleventh lowest daily summer minimum temperature and the lowest since 14.2 ºC on 9 February 2018 at 5:52 AM. Official stations in the Brisbane area observed the lowest temperature of the month on the 4th and 5th at most sites and at some site on the 14th and 27th. The lowest was 11.1 ºC at Beaudesert on the 6th and the highest was 19.8 ºC at Point Lookout on the 27th. There were some cool nights in the first week of the month and during some nights later in the month. Throughout the month however there was a high number of warm nights. Beerburrum observed a new record low for December minimum temperature of 11.5 ºC on the 6th exceeding the previous record of 11.6 ºC on the 7th December 2013. The lowest temperature for the season for the official sites ranged between 9.7 ºC at Canungra on 6 December 2019 and 19.8 ºC at Point Lookout on 5 December 2019. For summer the lowest observed temperature at Brisbane was 17.4ºC on 4 December 2019. Beerburrum observed a new record low for the lowest temperature in summer of 11.5 ºC exceeding the previous record of 11.6 in December 2013.
Lowest Monthly Minimum Temperature (for January): 18.6 ºC on 4 January 2020 at 4:38 AM. Same month in 2019 was 18.5 ºC. This is the second highest monthly minimum temperature for January on record, the highest since the current record high of 21 ºC in 2010 on 21 January, equal twenty-eighth lowest daily minimum temperature for January and the lowest since 18.5 ºC on 18 January 2019 at 5:11 AM. Official stations in the Brisbane area observed the lowest temperature of the month on the 4th and 5th at most sites and at some site on the 14th and 18th. The lowest was 14.8 ºC at Gatton on the 5th and the highest was 20.7ºC at Redcliffe on the 27th and Redcliffe and Brisbane on the 18th. There were some cool nights at the start of the month at some sites and during some nights in the middle of the month.
Lowest Monthly Minimum Temperature (for February): 19.6 ºC on 6 February 2020 at 6:00 AM. Same month in 2019 was 16.8 ºC. This is the highest monthly minimum temperature for February on record, exceeding the previous record high of 18.9 ºC in 2010 on 26 February, equal thirty-third lowest daily minimum temperature for February and the lowest since 16.8 ºC on 27 February 2019 at 1:58 AM. Official stations in the Brisbane area observed the lowest temperature of the month on the 2nd, 6th, 7th, 10th, 26th and 29th. The lowest was 18.7 ºC at Gatton on the 26th and the highest was 21 ºC at Point Lookout on the 29th. The lowest temperature at Brisbane was 19.9 ºC on the 6th. Due to persistent cloud cover there were a distinct lack of cool nights during the month.
Highest Temperature: 42.8 ºC on 16 December 2019 at 1:00 PM. Same month in 2018 was 37.2 ºC and the same season in 2018-19 was 39.8 ºC. This is the highest monthly and daily maximum temperature for December on record, exceeding the previous record high of 39.8 ºC in 2018 on 21 December at 2:47 PM. For summer this is the highest seasonal maximum temperature on record, exceeding the previous record high of 41.3 ºC in 2013-14 on 4 January at 2:40 PM. The official sites measured the highest temperature for the month on the 16th at many sites, and some sites in the 2nd, 4th and 6th. The lowest was 33.4 ºC at Cape Moreton Lighthouse on the 2nd and the highest was 43.4 ºC at Gatton on the 16th. Brisbane observed its highest temperature of 41.2 ºC on the 16th. There were a high number of days that saw above average maximum temperatures across all sites throughout the month and especially during the first half of the month. Many sites including the sites closer to the coast saw several days of temperatures near or greater than 40 ºC. On the 16th 7 sites observed maximum temperatures of 40 ºC or higher with Gatton, Archerfield, Logan City Treatment Plant, Beerburrum and Brisbane exceeded previous December highest maximum temperature records. Except for Logan City Treatment Plant which exceeded the record by 0.2 ºC these sites exceeded the record by between 1.2 ºC and 1.6 ºC. Brisbane observed a mean maximum temperature of 41.2 ºC (2.4 ºC above average) exceeding the previous record of 40 ºC on 24 December 2001. The highest temperature for the season of the official sites ranged between 33.4 ºC at Cape Moreton Lighthouse on 2 December 2019 and 43.4 ºC at Gatton on 16 December 2019. For summer the highest observed temperature at Brisbane was 41.2 ºC on 16 December 2019.
Monthly Highest Temperature (for February): 37.6 ºC on 3 February 2020 at 12:38 PM. The same month in 2019 was 36.7 ºC. This is the second highest monthly daily maximum temperature for February on record, the highest since the current record high of 40.5 ºC in 2017 on 12 February at 1:06 PM, the third highest daily maximum temperature for February and the highest since 38.5 ºC on 11 February 2017 at 12:55 PM. The official sites measured the highest temperature for the month on the 3rd at most sites, and some sites on the 1st and 18th. The lowest was 31.6 ºC at Cape Moreton Lighthouse on the 18th and the highest was 40.7 ºC at Gatton on the 3rd. Brisbane observed its highest temperature of 34.5 ºC on the 3rd. The first several days of the month saw high temperatures with many of the inland sites measuring temperatures that approached or exceeded 40 ºC. In the latter half of the month after significant period of cooler weather (associated with rainfall) was a period of warm days.
Lowest Maximum Temperature: 23.8 ºC on 6 February 2020 at 12:39 PM. This is the fifth lowest monthly lowest maximum temperature for February on record, the lowest since 21.5 ºC in 2018 on the 2 February at 2:27 PM, the seventh lowest maximum temperature for February and the lowest since 23.6 ºC on 21 February 2015 at 3:59 PM. This month in 2019 was 25.6 ºC and this season in 2018-19 was 23.9 ºC. For summer this is the fifth highest seasonal lowest maximum temperature on record, the lowest since 21.5 C in 2017-18 on 2 February at 2:27 PM, the equal thirteenth lowest daily maximum temperature and the lowest since 22.2 ºC in 2018 on 2 February at 2:27 PM. Many of the official stations in the Brisbane area measured the coolest day on 5th and at some sites on the 4th, 6th, 12th and 23rd. These ranged between 23.5 ºC at Beerburrum on 5th and 25.3 ºC at Archerfield on the 5th. In the Brisbane area cool days were experienced between the 4th and 13th and again on the 22nd and 23rd during cloudy days with rainfall. For summer the lowest observed maximum temperature at Brisbane was 25 ºC on 5 February 2020 and for all of the official sites this was 23.1 ºC at Gatton on 6 February 2020.
Lowest Monthly Maximum Temperature (for December): 26.6 ºC on 25 December 2019 at 9:00 AM. This is the second highest monthly lowest maximum temperature for December on record, the highest since 27.1 ºC in 2017 on 4 December at 10:05 AM, the twenty-sixth lowest maximum temperature for December and lowest since 23.9 ºC on 16 December 2018 at 9:00 AM. This month in 2018 was 23.9 ºC. Most of the official stations in the Brisbane area measured the coolest day on the 25th and at some coastal sites on the 17th. These ranged between 25.5 ºC at Cape Moreton Lighthouse on the 1st and 28.8 ºC at Beaudesert on the 25th. In the Brisbane area there were cool days on some days later in the month. The cool days on the 25th was associated with cloud coverage with showers.
Highest Minimum Temperature: 25.4 ºC on 23 January 2020 at 5:07 AM. This is the second highest monthly and daily January highest minimum temperature on record, and the highest since 26.8 ºC in 2017 on 21 January at 11:10 PM. This month in 2019 was 22.9 ºC and this season in 2018-19 was 25.0 ºC. For summer this is the second highest seasonal daily minimum temperature, the third highest daily minimum temperature and the highest since the current record high of 26.8 ºC in 2016-17 on 21 January at 11:10 PM. During January nights were above average during most of the month especially later in the month with all of the highest temperatures between the 23rd and 25th. These ranged between 24.3 C at Gatton on the 24th and 26.4 C at Logan City Treatment Plant on the 25th. Brisbane’s highest minimum temperature observed during summer was 26.7 ºC on 23 January 2020 and this was the highest for all the official sites.
Seasonal Average Minimum Grass Temperature: 19.7 ºC (1.1 ºC higher than same season in 2018-19)
Lowest Seasonal Minimum Grass Temperature: 11 ºC on 4 December 2019 (2 ºC lower than same month in 2018). This coincided with the lowest minimum temperature of 14.4 ºC for the month.
Highest Seasonal Minimum Grass Temperature: 24.7 ºC on 23 January 2020 (3.4 ºC lower than same month in 2019). This coincided with the highest minimum air temperature of 24.4 ºC for the month.
Highest Minimum Grass Temperature Depression: 5.3 ºC on 24 December 2019 with a minimum grass temperature of 18.1 ºC and an air temperature of 23.4 ºC.
Lowest Minimum Grass Temperature Depression: -0.4 ºC on 7 February 2020 with a minimum grass temperature of 20.5 ºC and an air temperature of 20.1 ºC.
Minimum temperatures in December was mostly above average with some nights close to average and a low number of below average nights mostly early in the month. The 4th to 5th was 4 ºC to 5 ºC below average when the coolest temperatures of the month occurred before a warmer period from the 8th. The 8th was 4 ºC above average, 3 ºC above average on the 9th and 3 ºC above average on the 11th. The 12th was close to average, warming to 3 ºC above average on the 13th and cooling again to near average on the 14th. It was 4 ºC above average on the 23rd and 24th and cooled to 2 ºC above average on the 25th to 27th.
Minimum temperatures during January were cool or close to average in the first week of the month, followed by above average temperatures during most of the remainder of the month. The 20th and 21st saw temperatures 4 ºC above average, 5 ºC above average on the 23rd (the highest temperature of the month) followed by 4 ºC above average on the 24th and 25th. The temperature rose to 2 ºC above average on the 27th and 28th and 3 ºC above average on the 29th and 30th.
Minimum temperatures in February were above average during most days of the month, with some days of near average minimum temperatures. The middle part of the month between the 8th and 19th saw an extended period of above average minimum temperatures of up to 3 ºC above average. Minimum temperatures were close to average on the 22nd to 26th. The 27th was 3 ºC above average.
In December maximum temperatures were predominately above average especially in the first half of the month. Cool days during the month only occurred in the last week of the month with a low number of close to average days occurring. The month started with a 12-day period of high temperature and was 9 ºC above average on the 5th to 7th with 39 ºC maximum temperatures on these days. The temperature eased back to 2 ºC to 3 ºC above average on the 8th and 9th before warming again to 3 ºC to 6 ºC above average on the 10th to 12th. Cooler temperatures followed briefly with the 13th 1 ºC above average before rising to 2 ºC above average on the 14th, 4 ºC above average on the 15th before the highest temperature of the month which was 13 ºC above average. Cooler conditions then followed with the 17th and 18th close to average before rising to 1 ºC above average on the 19th, 2 ºC to 3 ºC above average on the 20th to 22nd and then easing to 1 ºC to 2 ºC above average on the 23rd and 24th. The 25th was the coolest day of the month being 3 ºC below average, followed by near average on the 26th and cooling to below average as much as 3 ºC below average or close to average for the rest of the month.
Maximum temperatures experienced in January were mostly above average during two extended periods separated by a period of cooler days and below average on some days during the middle of the month. A 11 day period of above average temperatures between the 1st and 11th peaking at 3 ºC above average on the 8th and 9th. and 4 ºC above average on the 10th and 11th. Near average to below average through to the 18th and as much as 3 ºC below average. Above average temperature followed for the rest of the month and was 4 ºC above average on the 20th and 24th and 5 ºC above average on the 21st, 22nd and 29th.
February maximum temperatures saw a mixture of above average and below average temperatures during the month. The first half of the month saw some days of near average maximum temperatures. The first few days of the month saw temperatures of 3 to 8 ºC above average, before a 11 day period of near average to below average temperatures with the lowest being 6 ºC on the 5th and 6th. The 15th and 20th was a warm period of temperatures of 3 to 6 ºC above average. After a brief near average period a cool period followed on the 23rd to 25th falling to 5 ºC below average. A warmer period with temperatures of between 1 and 4 ºC above average occurred at the end of the month.
Seasonal Mean Minimum Pressure: 1009.8 hPa (1.6 hPa lower than same season in 2018-19). This is the fourth lowest on record for summer and the lowest since the 1009.6 hPa in 2017-18.
Monthly Mean Minimum MSL Pressure (for January): 1010.3 hPa (2.7 hPa lower than same month in 2019). This is the second highest on record for January and the highest since the current record high of 1015.4 hPa in 2010.
Monthly Mean Minimum MSL Pressure (for February): 1008.5 hPa (1.7 hPa lower than same month in 2019). This is the lowest on record for February exceeding the previous record low of 1009.3 hPa in 2018.
Seasonal Mean Maximum Pressure: 1014.4 hPa (2.3 hPa lower than same season in 2018-19). This is the fifth lowest on record for summer and the highest since 1014.2 hPa in 2017-18.
Monthly Mean Maximum MSL Pressure (for January): 1014.2 hPa (2.5 hPa lower than same month in 2019). This is the second highest on record for January and the highest since the current record high of 1016.9 hPa in 2010.
Monthly Mean Maximum MSL Pressure (for February): 1013.3 hPa (1.4 hPa lower than same month in 2019). This is the lowest on record for February exceeding the previous record low of 1013.6 hPa in 2012.
Seasonal Mean Pressure: 1012.1 hPa (1.0 hPa below average) and 1.5 hPa lower than same season in 2018-19. This is the fourth lowest on record for summer and the lowest since 1011.9 hPa in 2017-18.
Monthly Mean MSL Pressure (for January): 1012.3 hPa (0.1 hPa above average, 2.6 hPa lower than same month in 2019). This is the second highest on record for January and the lowest since the current record high of 1016.1 hPa in 2010.
Monthly Mean MSL Pressure (for February): 1010.9 hPa (3.1 hPa below average, 1.5 hPa lower than same month in 2019). This is the lowest on record for February exceeding the previous record low of 1011.8 hPa in 2012.
Lowest Seasonal MSL Pressure: 998.2 hPa on 2 December 2019 at 3:03 PM. The same month in 2018 and the same season in 2018-19 saw 1000.4 hPa. This is the second lowest monthly and daily minimum air pressure for December, and the lowest since the current record low of 998 hPa in 2009 on 27 December. For summer this is the third lowest seasonal minimum air pressure, the fourth lowest daily minimum air pressure and the lowest since 997.3 hPa on 28 January 2013 at 3:57 AM (Ex Tropical Cyclone Oswald).
Seasonal Highest Pressure: 1021.2 hPa on 9 December 2019 at 8:07 AM. The same month in 2018 saw 1021.8 hPa and the same season in 2018-19 was 1023 hPa. This is the fifth lowest December monthly maximum air pressure, the lowest since 1019.5 hPa in 2017 on 10 December at 8:42 PM, the equal fourteenth highest daily maximum air pressure for December and the highest since 1021.4 hPa on 8 December 2018 at 8:40 AM. For summer this is the fourth lowest seasonal pressure on record, the lowest since 1019.7 in 2017-18 on 7 February at 8:44 PM, the equal eighteenth highest daily air pressure and the highest since 1023 hPa on 28 February 2018 at 9:16 AM.
Monthly Highest Pressure (for January): 1018.4 hPa on 31 January 2020 at 8:38 AM. The same month in 2019 saw 1019.5 hPa. This is the second lowest January monthly maximum air pressure, the lowest since 1017.8 hPa in 2017 on 29 January at 8:45 PM, the twenty-fifth highest daily maximum air pressure for January and the highest since 1019 hPa on 21 January 2019 at 9:23 AM.
Note: Air pressure measurements are being closely monitored to maintain its accuracy as much as possible. Over the season of summer 2019-20, a difference of 0.11 hPa lower compared to the official BoM Brisbane site – No. 040913 was observed which is deemed to be optimum.
Seasonal Average Minimum Humidity: 44.3 % (0.2 % higher than same season in 2018-19 and 0.4 % above average). This is the second lowest on record for summer and the lowest since the current record high of 44.1% in 2018-19.
Monthly Mean Minimum Humidity (for December): 32.3 % (14 % lower than same month in 2018 and 9.5 % below average). This is the lowest on record for December exceeding the previous record low of 38.7% in 2009.
Seasonal Average Maximum Humidity: 83.1% (1.7% lower than same season in 2018-19 and 3.2% below average). This is the lowest on record for summer exceeding the previous record low of 84.8% in 2018-19.
Monthly Mean Maximum Humidity (for December): 76.5 % (11.2 % lower than same month in 2018 and 9.4 % below average). This is second lowest on record for December and the lowest since the current record low of 86 % in 2009.
Monthly Mean Maximum Humidity (for January): 83.7 % (1.9 % lower than same month in 2019 and 2.4 % below average). This is second lowest on record for January and the highest since 89.4 % in 2018.
Seasonal Mean Humidity: 63.7% (0.7 % lower than same season in 2018-19 and 1.4 % below average). This is lowest on record for summer exceeding the previous record of 64.4 % in 2018-19.
Monthly Mean Humidity (for December): 54.4 % (12.6 % lower than same month in 2018 and 9.5 % below average). This is the lowest on record for December exceeding the previous record low of 62.1% in 2009.
Seasonal Lowest Humidity: 1 % on 5 December 2019 at 9:21 AM (12 % lower than this month in 2018). This is the lowest monthly and daily minimum humidity for December on record exceeding the old record of 10 % on 5 December 2012 at 7:15 PM. For summer this is the lowest seasonal and daily minimum humidity on record exceeding the previous record of 10 % in 2012-13 on 5 December at 7:15 PM.
Monthly Lowest Humidity (for February): 27 % on 2 February 2020 at 12:58 PM (1 % lower than this month in 2019). This is the lowest monthly and daily minimum humidity for February on record and the lowest since 28% in 2019 on 23 February at 3:17 PM.
Seasonal Highest Humidity: 93 % on 14 February 2020 at 6:44 AM (4 % lower than this month in 2019 and this season in 2018-19). This is the lowest monthly February maximum humidity on record exceeding the previous record low of 95% in 2012 on 25 February at 7:25 AM. For summer this is the lowest seasonal maximum relative humidity on record exceeding the previous record low of 97 % in 2018-19 on 18 December at 12:36 AM.
Monthly Lowest Humidity (for December): 91 % on 25 December 2019 at 2:12 AM (6 % lower than this month in 2018). This is the lowest monthly December maximum humidity on record exceeding the previous record low of 95% in 2016 on 26 December at 6:00 AM.
Monthly Lowest Humidity (for January): 92 % on 26 January 2020 at 6:37 AM (2 % lower than this month in 2019). This is the lowest monthly January maximum humidity on record exceeding the previous record low of 94% in 2019 on 4 January at 6:10 AM.
Seasonal mean minimum dew point: 14.3 ºC (0.2 ºC above average). This is the lowest seasonal mean minimum dew point on record for summer, exceeding the previous record low of 15.6 ºC in 2018-19.
Monthly mean minimum dew point (for December): 8.5 ºC (5 ºC below average). This is the lowest monthly mean minimum dew point for December on record exceeding the old record of 15.3 ºC in 2018.
Monthly mean minimum dew point (for January): 16.6 ºC (1.1 ºC above average). This is the second lowest monthly mean minimum dew point for January on record and the lowest since the current record low of 16.2 ºC in 2019.
Seasonal mean maximum dew point: 20.6 ºC (0.5 ºC below average). This is the fourth lowest seasonal mean maximum dew point on record for summer and the highest since 21.9 ºC in 2017-18.
Monthly mean maximum dew point (for December): 18 ºC (0.9 ºC below average). This is the second lowest monthly mean maximum dew point for December and the lowest since the current record low of 16.4 ºC in 2009.
Monthly mean maximum dew point (for February): 22.5 ºC (2.4 ºC above average). This is the highest monthly mean maximum dew point for February exceeding the previous record high of 22.3 ºC in 2018.
Seasonal mean dew point: 17.4 ºC (0.2 ºC above average). This is the lowest seasonal mean dew point on record for summer, exceeding the previous record low of 17.9 ºC in 2018-19.
Monthly mean dew point (for December): 13.3 ºC (2.9 ºC below average). This is the lowest monthly mean dew point for December on record exceeding the previous record low of 16.9 ºC in 2009.
Monthly mean dew point (for January): 18.9 ºC (1.1 ºC above average). This is the second lowest monthly mean dew point for January and the lowest since the current record low of 18.3ºC in 2019.
Seasonal lowest dew point: -29.8 ºC on 5 December 2019 at 9:30 AM. This is the lowest monthly and daily dew point for December and summer on record, exceeding the previous record of 2.5 ºC on 5 December 2012 at 9:25 PM.
Seasonal highest dew point: 25.4 ºC on 15 February 2020 at 1:57 PM. This is the third highest monthly maximum dew point on record for February, the highest since 27.2 ºC in 2018 on 14 February at 2:40 PM, the equal seventh highest daily dew point for February and the highest since 25.6 ºC on 26 February 2018 at 3:11 PM. For summer this is the fourth lowest seasonal maximum dew point on record and the highest since the current record low of 27.2 ºC in 2018 on the 14 February at 2:40 PM, the equal thirteenth highest daily dew point and the highest since 25.6 ºC on 26 February 2018 at 3:11 PM.
Monthly highest dew point (for December): 22.4 ºC on 25 December 2019 at 11:13 AM. This is the second lowest monthly maximum dew point on record for December, the lowest since the current record low of 20.8 ºC in 2009 on 20 December, the equal twenty-sixth highest daily dew point for December and the highest since 23.1 ºC on 22 December 2018 at 3:42 PM.
Maximum Wind Gust: 54 km/hr on 11 December 2019 at 10:07 AM. This is the fifth highest and lowest December maximum wind gust and the highest since 59.6 km/hr in 2017 on the 8 December at 9:32 PM. The maximum wind gust this month in 2018 was 48 km/hr and this season in 2018-19 was 48 km/hr. This is the tenth highest daily wind gust on record for December and the highest since 55.7 km/hr in 2017 on the 9 December at 5:42 PM. For summer this is the fifth lowest maximum seasonal wind gust, the twenty-fourth highest daily wind gust and the highest since 99.8 km/hr in 2017-18 on 11 February at 6:24 PM.
Maximum Monthly Wind Gust (for February): 33 km/hr on 21 February 2020 at 11:49 AM. This is the second highest February maximum wind gust and the lowest since the current record low of 32.9 km/hr in 2012 on the 2 February at 7:47 AM. The maximum wind gust this month in 2019 was 44 km/hr. This is equal fifty-fifth highest daily wind gust on record for February and the highest since 37 km/hr in 2019 on the 25 February at 12:47 PM.
Maximum Wind Speed: 27 km/hr on 2 December 2019 at 10:55 AM (Moderate Force Wind). This is the second lowest monthly maximum wind speed for December on record, the highest since 41.6 km/hr in 2017 on 9 December at 5:50 PM, the thirty-first highest daily wind speed on record for December and the highest since the aforementioned 31.1 km/hr on 25 December 2017 at 7:42 AM. This season in 2018 was 45.7 km/hr. For summer this is the second lowest seasonal maximum wind speed, the highest since 41.6 km/hr in 2017-18 on 9 December at 5:50 PM, the fifty-fourth highest daily maximum wind speed and the highest since 31.8 km/hr on 21 February 2018 at 5:30 PM.
Monthly Maximum Wind Speed (for February): 19 km/hr on 3 February 2020 at 4:05 PM (Light Force Wind). This is the second lowest monthly maximum wind speed for February on record, the lowest since the current record low of 18.1 km/hr in 2012 on 20 February at 5:35 PM, equal fifty-first highest daily wind speed on record for February and the highest since 22 km/hr on 22 February 2019 at 12:40 PM.
Seasonal Wind Run: 11418.4 km (271.4 km less than same season in 2018-19). This is the second highest on record and the highest since the current record high of 11689.8 km in 2018-19. This is 3887.1 km above average and 51.6 % above average.
Wind Run (for December): 4463.4 km (409.4 km higher than same month in 2018), 1327.4 km above average and 42.3 % above average. This is the highest on record for December total wind run exceeding the previous record of 4054 km in 2018.
Wind Run (for January): 4155.2 km (541.8 km higher than same month in 2019), 1035.7 km above average and 33 % above average. This is the highest on record for January total wind run exceeding the previous record of 3613.4 km in 2019.
Wind Run (for February): 2799.8 km (1222.6 km lower than same month in 2019), 911.2 km above average and 29.2 % above average. This is the second highest on record for February total wind run and the highest since the current record high of 4022.4 in 2019.
Seasonal Mean Wind Speed: 5.2 km/hr (0.3 km/hr lower than this season in 2018-19, 0.9 km/hr above average and 21.6 % above average) and the second highest on record, with the current record being 5.5 km/hr in 2018-19.
Monthly Mean Wind Speed (for December): 6.0 km/hr (1.8 km higher than this month in 2018), 1.9 km/hr above average and 46.3 % above average. This is the highest on record for December exceeding the previous record high of 5.5 km/hr in 2018.
Monthly Mean Wind Speed (for January): 5.5 km/hr (1.8 km higher than this month in 2019), 1.5 km/hr above average and 38.8 % above average. This is the highest on record for January exceeding the previous record high of 4.9 km/hr in 2019.
Monthly Mean Wind Speed (for February): 4.1 km/hr (1.8 km higher than this month in 2019), 0.1 km/hr below average and 2.4 % above average. This is the second highest on record for February and the highest since the current record low of 6 km/hr in 2019.
Daily Mean Maximum Wind Gust: 28.1 km/hr (0.3 km lower than this season in 2018-19), 3.7 km/hr above average and 15.1% above average. This is the fourth lowest daily mean maximum wind gust for summer on record and the lowest since 23.7 km/hr in 2011-12.
Daily Mean Maximum Wind Gust (for February): 24.3 km/hr (5.5 km/hr lower than this month in 2019), 0.2 km/hr below average and 0.8% below average. This is the second lowest daily mean maximum wind speed on record for February and the lowest since the current record low of 22.2 km/hr in 2012.
Daily Mean Maximum Wind Speed: 15.0 km/hr, 0.7 km/hr higher than this season in 2018-19, 4.9 km/hr above average and 12 % above average. This is the third lowest daily mean maximum wind speed on record for summer and the highest since 19 km/hr in 2017-18.
Daily Mean Maximum Wind Speed (for December): 16.6 km/hr, 1.9 km/hr higher than this month last year, 5.9 km/hr above average and 55.2 % above average. This is the second highest daily mean maximum wind speed on record for December and the highest since 18.8 km/hr in 2017.
Daily Mean Maximum Wind Speed (for February): 12.7 km/hr, 2 km/hr lower than this month in 2019), 2.7 km/hr above average and 26.6 % above average. This is the second lowest daily mean maximum wind speed on record for February and the lowest since the current record low of 10.1 km/hr in 2012.
Dominant Direction: E (SE this season in 2018-19).
Seasonal Rainfall Total: 628.5 mm (192.5 mm above average and 160.7 % of the long term average), this season in 2018-19 was 131.1 mm. This is the sixth highest summer rainfall on record, the highest since 652.9 mm in 2014-15 and ranks as decile 9/ 84th percentile and as high. Summer rainfall totals across the Brisbane area were near or above the long term average. The above average rainfall were mostly observed by the coastal sites. Gatton measured the lowest rainfall total of the main official sites which was 307.5 mm (69 % of the long term average), ranked as low and was the lowest of the main official sites. The lowest total observed by all the official sites was 143.2 mm at Wivenhoe Dam. Some sites measured totals that ranked as average and these were Amberley with a total of 356.4 mm (100% of the long term average), Beaudesert with a total of 370.4 mm (139% of the long term average), and Beerburrum with a total of 555 mm (99% of the long term average). The remaining sites measured totals that ranked as high or very high. The highest fraction of the long term average was 176 % at Brisbane Airport with a total of 683.8 mm and ranked as very high. The highest total of the main sites was 799.2 mm at Redland (Alexandra Hills) and of all the sites the highest was 865.1 mm at Caloundra Airport. Cape Moreton measured a total of 722 mm which was the highest since 926.3 mm in 1973 and Manly Railway Station measured 725.8 mm was the highest since 1103.8 mm in 1973, though higher totals in the past may have been unreported at these sites. Brisbane measured a total of 79.2 mm and was 169% of the long term average.
Number of Rain Days: 42 days, 7 greater than same season in 2018-19 and 6.6 days below average. This is the seventh highest on record for summer and the equal highest since 42 days in 2017-18.
Number of Rain Days (0.1 mm or greater) for December: 7 days, 6 less than this month in 2018 and 3.1 days below average. This is the equal fifth lowest on record for December and is the lowest since 3 days in 2008.
Number of Rain Days (0.1 mm or greater) for January: 20 days, 7 greater than this month in 2019 and 8.2 days above average. This is second highest on record for February and is the highest since the current record high of 21 days in 2015.
Highest Daily Total: 93.9 mm on 7 February 2020. This is the ninth highest for February highest daily rainfall on record on monthly and daily basis and the highest for February or for any month since 143.4 mm on 24 February 2018. The highest daily total in the Brisbane area of all official sites was 185mm at Ormiston College on 13 February 2020, and which is a new record high of February highest daily rainfall total exceeding the previous record of 134 mm on the 3rd in 1990. Point Lookout with a total of 102.2 mm observed its highest February daily rainfall total exceeding the previous record of 97.4 mm on the 2nd in 2001. For summer this is the fifteenth highest daily rainfall total on record, the sixteenth highest daily rainfall total and the highest since 143.4 mm in 2017-18 on the 24 February. The highest daily total in the Brisbane area of all official sites was 21 mm at Coomera Foxwell Road on 18 January 2020. Point Lookout recorded its highest daily rainfall total on record of 102.2 mm in 9 February 2020 exceeding the previous record of 100.4 mm on 2 December 2005.
Highest Daily Total for January: 90.9 mm on 18 January 2020. This is the seventh highest of January highest daily rainfall on record on monthly and daily basis and the highest since 271.3 mm on 28 January 2013 (Ex Tropical Cyclone Oswald). The highest daily total in the Brisbane area of all official sites was 141.4 mm at Redland (Alexandra Hills) on the 18 January 2020.
Wettest Month (February): 389.2 mm (227.4 mm above average) and 240.5% of the long-term average. This total is in decile 9/ 94th percentile which ranks as high and 244.3 mm above the long-term median (253.1 % of long term median). This total is higher than this month last year which was 39.8 mm, the third highest on record for February and the highest since 464.75 mm in 1995. For all months of the year this is the highest since 480.7 mm in January 2013. The long period rainfall totals improved further following rainfall in February on the short timespans. For 6 month rainfall this is 90 mm above average (decile 8) with a total of 694 mm, 9 monthly rainfall is 30 mm above average (decile 5) with a total of 759.3 mm and 12 monthly rainfall is 50 mm above average (decile 6 with a total of 1102.5 mm. 18 monthly to 36 monthly rainfall remains very much below average at 90 to 260 mm below average though close to average on decile ranking except for 24 monthly rainfall being in decile 3, whilst the 48 month rainfall is close to average (decile 6).
The main official sites in the Brisbane area observed above average or well above average rainfall totals during February. Gatton however was the sole site measuring a total that ranked as average with a total of 121.8 mm (122 % of the long term average. Of these main sites Gatton observed the lowest rainfall total, though for all the sites the lowest total was 70.2 mm at Central Kerry. Of the main sites the highest rainfall totals were observed by the coastal sites which saw totals that were over 300 mm with some sites observing totals that were over 400 mm. The highest was 530.2 mm at Cape Moreton Lighthouse which was 341 % of the long term average and ranked as very high. Brisbane Aero observed a total of 454.2 mm (338 % of the long term average) and was the highest on record for February exceeding the previous record high of 284.8 mm in 2015. Point Lookout with 472.8 mm (296% of the long term average) and Logan City Treatment Plant with 386 mm (238% of the long term average) along with rainfall only sites that also observed record high rainfall totals for February. Many locations also observed record high rainfall totals for February in at least 20 years which included the main sites of Cape Moreton Lighthouse and Archerfield Airport. Other sites that saw totals that ranked as very high were Redcliffe with a total of 368.4 mm (267% of the long term average), Brisbane with a total of 365.8 mm (243% of the long term average) and Beaudesert with a total of 272 mm (218 % of the long term average). Amberley, Archerfield and Beerburrum saw totals that ranked as high of between 156 % and 201% of the long term average. The highest monthly total of all the sites was 650.8 mm at Caloundra Airport.
Driest Month (December): 56 mm (73.2 mm below average) and 43.3% of the long-term average. This total is in decile 2/ 16th percentile which ranks as very low and 32 mm below the long-term median (63 % of long term median). This total is lower than this month last year which was 80.1 mm, and the fourth lowest on record for December and the lowest since 49.7 mm in 2013. Rainfall for 2019 as a whole was 53.7% of the long-term average. Several long period rainfall totals have continued to see well below average rainfall totals at Ferny Grove. July to December rainfall was 130.8 mm (236.9 mm below average), which is in the lowest 10 % of the records for 6 month period rainfall for all months and the lowest for July to December rainfall since 93 mm in 2003. The 9 monthly rainfall total was 474 mm (148.8 mm below average and in the lowest 20% of records) and was the lowest since 372.4 mm in 2014. 12 monthly, 18 monthly and 24 monthly rainfall totals also shows a strong negative anomaly from the long-term average of between 369 mm below average for 18 month rainfall total to 511.8 mm below average for the 12 month rainfall total.
Many of the main official sites in the Brisbane area saw well below average rainfall totals whilst some sites observed near average or above average rainfall totals. Of all the official sites Woodford Stanmore observed record low December rain total of 49.7 mm (old record was 49.8 mm in 2015) and Lindfield, Coominya Post Office, Esk Post Office and Somerset Dam saw totals that were the lowest in 25 to 43 years. Many sites at coastal and inland locations observed totals that ranked as low ranging between 34% of the long-term average (Gatton measuring 33.2 mm) which the lowest total of the main official sites and 52% of the long-term average (Point Lookout with 67.2 mm). Archerfield observed a total of 134.4 mm which ranked as average (108% of the long-term average). Also ranking as average was Brisbane Aero which observed a total of 112.4 mm (94% of the long-term average). The highest total of the main sites was 207.8 mm at Brisbane which ranked as high (161 % of the long-term average and observed the highest anomaly above the long-term average). Of all the official sites the highest monthly total was 222.3 mm at Brisbane Botanic Gardens Mt Coot-Tha and the lowest monthly total was 20.9 mm at Lindfield.
January Monthly Rainfall: 183.3 mm (38.3 mm above average) and 126.4% of the long-term average. This total is in decile 8/ 79th percentile which ranks as high and 57.9 mm above the long-term median (144.6 % of long term median). This total is higher than this month last year which was 11.2 mm, and the eighth highest on record for January and the highest since 208.1 mm in 2015. Long period rainfall totals deficiencies improved in January following below average rainfall totals in 2019 with all long period totals no longer in the lowest 20% of records. August to January rainfall total was 23.2 mm above average (decile 6) with a total of 500.6 mm. 9 monthly to 48 month rainfall totals also improved especially for 36 month and 48 month totals and was between 21.8 mm below average for 48 month rainfall and 242.8 mm below average for 24 month rainfall.
The main official sites in the Brisbane area observed near average rainfall totals in January and above average at some sites. The except to this was Gatton which measured a total of 58.6 mm (53% of the long term average), ranked as low and observed the lowest monthly total of these main sites. Most sites ranked historically as average and saw totals that ranged between 82% of the long term average at Point Lookout (108.6 mm) and 135% of the long term average at Redcliffe (187.8 mm). Logan City Treatment Plant ranked as high with a total of 172.3 mm which is 135 % of the long term average. The highest total of the main sites was 257.0 mm at Redlands (Alexandra Hills). Of all the official sites the highest monthly total was 261.5 mm at Godwin Beach and the lowest monthly total was 37.4 mm at Wivenhoe Dam. Brisbane measured a total of 165.6 mm (118% of the long term average) and ranked as average.
Seasonal Rainfall Total – (automatic gauge) 24 hours to 9am: 536.4 mm (92.1 mm less than official standard gauge and within 17.1 %). Highest daily total of automatic gauge, (24 hours to 9am): 78.2 mm on 18 January 2020, (24 hours from midnight): 99.2 mm on 6 February 2020.
Note: This automatic gauge for the season, fail to meet the expected accuracy (of +/- 10% of the standard gauge) of -17.1%. Note: The rain gauge didn’t meet the expected accuracy for February, namely -2.5% for December, -8% for January and -19.5% for February.
There was 9 days with falls of at least 25 mm (8 greater than same season in 2018-19) with 8 days of less than 1mm (9 less than same season in 2018).
Highest rainfall rate was 188.8 mm/hr on the 24 December 2019 at 7:51 PM. This is the highest monthly rainfall rate for December and exceeded the previous record high of 112.8 mm/hr in 2015 on 10 December at 7:27 PM. For summer this is the third highest seasonal and daily rain rate and the highest since the current record high of 273.4 mm/hr in 2017-18 on 26 February at 8:35 PM.
Monthly highest rainfall rate (for January): 167 mm/hr on the 19 January 2020 at 11:49 AM. This is the second highest monthly and daily rainfall rate for January and the highest since the current record high of 217.2 mm/hr on 2 January 2017 at 8:06 PM.
Monthly highest rainfall rate (for February): 157.8 mm/hr on the 7 February 2020 at 10:41 AM. This is the second highest monthly rainfall rate for February, the highest since the current record high of 273.4 mm/hr in 2018 on 2 January 2018 at 8:06 PM, the third highest daily rainfall rate for February and the highest since 186 mm/hr on 19 February 2016 at 10:35 PM.
The highest hourly rainfall total was 33.6 mm on the 17 January 2020 at 11:14 PM. This is the second highest hourly rain on monthly and daily basis for January and the highest since 53.9 mm on 2 January 2017 at 7:46 PM. For summer this is the fourth highest seasonal and daily maximum hourly rainfall, and the highest since 44 mm in 2017-18 on 26 February at 8:57 PM.
In December rainfall was below average with a total of 56 mm and 43.3% of the long term average which ranked as very low. Rainfall fell over 7 days which was 3.1 days below average. Many of the main official sites in the Brisbane area saw well below average rainfall totals whilst some sites observed near average or above average rainfall totals. In the evening of the 11th slow moving severe thunderstorms produced heavy rainfall at Brisbane and surrounding areas. Brisbane saw 120 mm in the 2 hours from 10pm with a new record for December daily rain of 130.4 mm on the 12th exceeding the previous record of 84 mm on 31 December 2001. Between the 24th and 27th there were thunderstorms and showers in the Greater Brisbane Area with total of more than 20 mm. During December at Ferny Grove there were showers and storms with low or no rainfall early in the month. There were some showers and thunderstorms between the 12th and 14th and between the 24th and 27th, including a severe thunderstorm with fierce electrical activity on the 24th.
Rainfall in January was near average with a total of 183.3 mm which was 126.4% of the long term average and ranked as high. Rainfall was observed over 15 days which was 4.9 days above average. The main official sites in the Brisbane area observed near average rainfall totals in January and above average at some sites. The except to this was Gatton which measured a total of 58.6 mm (53% of the long term average), ranked as low and observed the lowest monthly total of these main sites. During the start of the month over northern parts of Greater Brisbane was moderate falls from isolated thunderstorms. Very little rainfall occurred across the Brisbane area through to the 12th. From the 12th was showers and thunderstorms with moderate totals at some locations especially on the 17th and 18th. January saw dry weather at Ferny Grove in the first 10 days before showers and thunderstorms with heavy falls.
In February there was 389.2 mm of rainfall (well above average) which was 240.5% of the long term average and ranked as high. Rainfall was observed on 20 days which was 8.2 days below average. The main official sites in the Brisbane area observed above average or well above average rainfall totals during February. Gatton however was the sole site measuring a total that ranked as average with a total of 121.8 mm (122 % of the long term average. Several locations across the Greater Brisbane area saw the highest February rainfall totals on record. In February at Ferny Grove there were frequent rain, showers and storms throughout the month. The first several days saw mostly light falls, before increasing from the 6th with shower and storms which was accompanied by heavy falls with thunderstorms. A 11 day wet spell ended on the 14th before less frequent showers and thunderstorms for the remainder of the month with mostly light to moderate falls.
Number of severe thunderstorms: 3
Number of thunderstorms: 20 (Mild: 13, Moderate: 4)
Number of thunder days: 22 days
Number of nearby only storms: 9
Severe thunderstorms in the Brisbane area:
December:
January
February
NOTE: This is a summary of the aforementioned monthly and seasonal records exceeded over a monthly basis. Additionally it lists records that are the lowest or highest in at least 5 years. See end notes for more information about record periods.
Record high summer mean minimum temperature in at least 5 years |
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Observed [C] |
Most recent higher |
Years of record |
Seasonal average |
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20.9 |
21.8 in 2009-10 |
10 |
27.1 |
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Record high December mean minimum temperature in at least 5 years |
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Observed [C] |
Most recent higher |
Years of record |
Monthly average |
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19.6 |
20 in 2009 |
10 |
20.2 |
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Record high January mean minimum temperature in at least 5 years |
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Observed [C] |
Most recent higher |
Years of record |
Monthly average |
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21.9 |
22.9 in 2010 |
10 |
20.7 |
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Record high February mean minimum temperature in at least 5 years |
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Observed [C] |
Most recent higher |
Years of record |
Monthly average |
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21.2 |
21.4 |
10 |
20.3 |
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Record high December mean maximum temperature |
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Observed [C] |
Old record |
Years of record |
Monthly average |
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33 |
32.2 in 2009 |
10 |
30 |
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Record high December mean temperature in at least 5 years |
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Observed [C] |
Most recent higher |
Years of record |
Monthly average |
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26.3 |
26.4 in 2009 |
10 |
24.5 |
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Record high February minimum temperature |
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Observed [C] |
Old record |
Years of record |
Monthly average |
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19.6 on 6th at 6:00 AM |
18.9 in 2010 on 26th February |
10 |
20.3 |
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Record high January mean minimum MSL pressure in at least 5 years |
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Observed [hPa] |
Most recent higher |
Years of record |
Monthly average |
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1010.3 |
1015.4 in 2010 |
10 |
1010.5 |
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Record low February mean minimum MSL pressure |
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Observed [hPa] |
Old record |
Years of record |
Monthly average |
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1008.5 |
1009.3 in 2018 |
10 |
1011 |
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Record high January mean maximum MSL pressure in at least 5 years |
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Observed [hPa] |
Most recent higher |
Years of record |
Monthly average |
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1014.2 |
1016.9 in 2010 |
10 |
1014.4 |
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Record low February mean maximum MSL pressure |
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Observed [hPa] |
Old record |
Years of record |
Monthly average |
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1010.9 |
1011.8 in 2012 |
10 |
1015.1 |
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Record high January mean MSL pressure in at least 5 years |
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Observed [hPa] |
Most recent higher |
Years of record |
Monthly average |
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1012.3 |
1016.1 in 2010 |
10 |
1012.2 |
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Record high February mean MSL pressure |
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Observed [hPa] |
Old record |
Years of record |
Monthly average |
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1010.9 |
1011.8 in 2012 |
10 |
1014 |
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Record low summer minimum MSL pressure in at least 5 years |
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Observed [hPa] |
Most recent lower |
Years of record |
Seasonal average |
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998.2 on 2 December 2019 at 3:03 PM |
997.3 on 28 January 2013 at 3:57 AM |
10 |
1010.7 |
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Record low December minimum MSL pressure in at least 5 years |
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Observed [hPa] |
Most recent lower |
Years of record |
Monthly average |
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998.2 on 2nd at 3:03 PM |
998 in 2009 on 27th |
10 |
1010.6 |
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Record low December mean minimum relative humidity |
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Observed [%] |
Old record |
Years of record |
Monthly average |
||||||
32.3 |
38.7 in 2009 |
10 |
41.8 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer mean maximum relative humidity |
|||||||||
Observed [%] |
Old record |
Years of record |
Seasonal average |
||||||
83.1 |
84.8 in 2018-19 |
10 |
86.3 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low December mean maximum relative humidity in at least 5 years |
|||||||||
Observed [%] |
Most recent lower |
Years of record |
Monthly average |
||||||
76.5 |
86 in 2009 |
10 |
85.9 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer mean relative humidity |
|||||||||
Observed [%] |
Old record |
Years of record |
Seasonal average |
||||||
63.7 |
64.4 in 2018-19 |
10 |
65.1 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low December mean relative humidity |
|||||||||
Observed [%] |
Old record |
Years of record |
Monthly average |
||||||
54.4 |
62.1 in 2009 |
10 |
63.9 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer and December minimum relative humidity |
|||||||||
Observed [%] |
Old record |
Years of record |
Seasonal/ Monthly average |
||||||
1 on 5th December 2019 at 9:21 AM |
10% in 2012 on 5th at 7:15 PM |
10 |
39.9/ 41.8 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low February minimum relative humidity |
|||||||||
Observed [%] |
Old record |
Years of record |
Monthly average |
||||||
27 on 2nd at 12:58 PM |
28 in 2019 on 23rd at 3:17 PM |
10 |
53.2 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer maximum relative humidity |
|||||||||
Observed [%] |
Old record |
Years of record |
Monthly average |
||||||
93 on 14 th at 12:58 PM |
97% on 18th December 2018 at 12:36 AM |
10 |
65.1 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low February maximum relative humidity |
|||||||||
Observed [%] |
Old record |
Years of record |
Monthly average |
||||||
93 on 14th at 12:58 PM |
95 in 2012 on 25th at 7:25 AM |
10 |
91.5 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low December maximum relative humidity |
|||||||||
Observed [%] |
Old record |
Years of record |
Monthly average |
||||||
91% on 25th at 2:12 AM |
95% in 2016 on 26th at 6:00 AM |
10 |
85.9 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low January maximum relative humidity |
|||||||||
Observed [%] |
Old record |
Years of record |
Monthly average |
||||||
92 on 26th at 6:37AM |
94% in 2019 on 4th at 6:10 AM |
10 |
86.1 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer mean minimum dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Seasonal average |
||||||
14.3 |
15.6 in 2018-19 |
9 |
14.1 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low December mean minimum dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Monthly average |
||||||
8.5 |
15.3 |
10 |
13.5 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer mean maximum dew point in at least 5 years |
|||||||||
Observed [C] |
Most recent lower |
Years of record |
Seasonal average |
||||||
20.6 |
21.9 in 2017-18 |
9 |
20.1 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low December mean maximum dew point in at least 5 years |
|||||||||
Observed [C] |
Most recent lower |
Years of record |
Monthly average |
||||||
18 |
16.4 in 2009 |
10 |
18.9 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer mean dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Seasonal average |
||||||
17.4 |
17.9 in 2018-19 |
10 |
17.2 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low December mean dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Monthly average |
||||||
13.3 |
16.9 in 2009 |
10 |
16.2 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer and December minimum dew point |
|||||||||
Observed [C] |
Old record |
Years of record |
Seasonal/ Monthly average |
||||||
-29.8 on 5th at 9:30 AM |
2.5 in 2012 on 5th at 9:25 PM |
10 |
14.1/ 13.5 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low December maximum dew point in at least 5 years |
|||||||||
Observed [C] |
Most recent lower |
Years of record |
Monthly average |
||||||
22.4 on 25th at 11:13 AM |
20.8 in 2009 on 20th |
10 |
18.9 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low February maximum wind gust in at least 5 years |
|||||||||
Observed [km] |
Most recent lower |
Years of record |
Monthly average |
||||||
33 on 21st at 11:49 AM |
32.9 in 2012 on 2nd at 7:47 AM |
9 |
24.5 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low February maximum wind speed in at least 5 years |
|||||||||
Observed [km] |
Most recent lower |
Years of record |
Monthly average |
||||||
19 on 3rd at 4:05 PM |
32.9 in 2012 on 2nd at 7:47 AM |
9 |
10 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high December total wind run |
|||||||||
Observed [km] |
Old record |
Years of record |
Monthly average |
||||||
4463.4 |
4054 in 2018 |
7 |
3136 |
||||||
|
|
|
|
|
|
|
|
|
|
Record high January wind run |
|||||||||
Observed [km] |
Old record |
Years of record |
Monthly average |
||||||
4155.2 |
3613.4 in 2019 |
9 |
3119.5 |
||||||
|
|
|
|
|
|
|
|
|
|
Record high November total wind run |
|||||||||
Observed [km] |
Old record |
Years of record |
Monthly average |
||||||
4788.7 |
3521.4 in 2018 |
7 |
3214.2 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high December monthly mean wind speed |
|||||||||
Observed [km/hr] |
Old record |
Years of record |
Monthly average |
||||||
6 |
5.5 in 2018 |
7 |
4.1 |
||||||
|
|
|
|
|
|
|
|
|
|
Record high January mean wind speed |
|||||||||
Observed [km/hr] |
Old record |
Years of record |
Monthly average |
||||||
5.5 |
4.9 in 2019 |
9 |
4 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low February daily mean wind speed in at least 5 years |
|||||||||
Observed [km] |
Most recent lower |
Years of record |
Monthly average |
||||||
12.7 |
10.1 in 2012 |
9 |
10 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low summer daily mean maximum wind gust in at least 5 years |
|||||||||
Observed [km/hr] |
Most recent higher |
Years of record |
Seasonal average |
||||||
28.1 |
23.7 in 2011-12 |
9 |
24.4 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low February daily mean wind speed in at least 5 years |
|||||||||
Observed [km] |
Most recent lower |
Years of record |
Monthly average |
||||||
12.7 |
10.1 in 2012 |
9 |
10 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high summer total rainfall in at least 5 years |
|||||||||
Observed [mm] |
Most recent higher |
Years of record |
Seasonal average |
||||||
628.5 |
652.9 in 2014-15 |
31 |
436 |
||||||
|
|
|
|
|
|
|
|
|
|
Record low December total rainfall in at least 5 years |
|||||||||
Observed [mm] |
Most recent lower |
Years of record |
Monthly average |
||||||
56 |
49.7 in 2013 |
30 |
129.2 |
||||||
|
|
|
|
|
|
|
|
|
|
Record high February total rainfall in at least 5 years |
|||||||||
Observed [mm] |
Most recent higher |
Years of record |
Monthly average |
||||||
389.2 |
464.75 in 1995 |
33 |
161.8 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record low December number of rain days in at least 5 years |
|||||||||
Observed [days] |
Most recent lower |
Years of record |
Monthly average |
||||||
7 |
3 in 2008 |
30 |
10.1 |
||||||
|
|
|
|
|
|
|
|
|
|
Record high February number of rain days in at least 5 years |
|||||||||
Observed [mm] |
Most recent higher |
Years of record |
Monthly average |
||||||
20 |
21 in 2015 |
33 |
11.8 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high January highest daily rainfall total in at least 5 years |
|||||||||
Observed [mm] |
Most recent higher |
Years of record |
Monthly average |
||||||
90.9 on 18th |
271.3 on 28th in 2013 |
33 |
56.5 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Record high December maximum rainfall rate |
|||||||||
Observed [mm/hr] |
Old record |
Years of record |
Monthly average |
||||||
188.8 on 24th at 7:51 PM |
112.8 in 2015 on 10th at 7:27 PM |
9 |
92.7 |
||||||
|
|
|
|
|
|
|
|
|
|
NOTE: These records are drawn from automatic data record for this site. See end notes for more information.
All time records |
Maximum Temperature 42.8 °C on 16 Dec 2019 at 1:00 pm |
Monthly records |
December |
Maximum Temperature 42.8 °C on 16 Dec 2019 at 1:00 pm |
Highest Daily Temperature Range 24.6 °C on 05 Dec 2019 |
Minimum Relative Humidity 1 % on 05 Dec 2019 at 9:21 am |
Maximum Rainfall Intensity 188.8 mm/hr on 24 Dec 2019 at 7:51 pm |
Wind Run 261.3 km/h on 02 Dec 2019 at 11:59 pm |
January |
No records |
February |
Minimum Relative Humidity 27 % on 02 Feb 2020 at 12:58 pm |
Highest Monthly Total 325.2 mm on 29 Feb 2020 at 12:00 am |
Longest Wet Period 13 days on 15 Feb 2020 |
Summary of Averages and Extremes for summer 2019-20 for Ferny Grove, Brisbane, Queensland, Australia |
||||||||||||||||
|
Min Temp |
Max Temp |
Mean Temp |
Temp Range |
Min Grass Temp |
Min Grass Temp Depression |
Min Relative Humidity |
Max Relative Humidity |
Mean Relative Humidity |
Min MSL pressure |
Max MSL Pressure |
Mean MSL Pressure |
Dew Point |
Max Wind Gust |
Max Wind Speed |
Daily rain |
December |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
19.6 |
33.0 |
26.3 |
13.4 |
18.0 |
1.6 |
32.3 |
76.5 |
54.4 |
1010.6 |
1015.8 |
1013.2 |
13.3 |
31.5 |
16.6 |
1.8 |
Min |
14.4 |
26.6 |
23.4 |
5.8 |
11.0 |
0.5 |
1 |
56 |
30.5 |
998.2 |
1004.9 |
1001.5 |
-29.8 |
21.0 |
11.0 |
|
Max |
23.4 |
42.8 |
31.5 |
24.5 |
22.8 |
5.3 |
72 |
91 |
81.5 |
1018.2 |
1021.2 |
1019.7 |
22.4 |
54.0 |
27.0 |
21.2 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
56.0 |
January |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
21.9 |
32.2 |
27.0 |
10.3 |
20.6 |
1.3 |
45.1 |
83.7 |
64.4 |
1010.3 |
1014.2 |
1012.3 |
18.9 |
28.5 |
15.7 |
5.9 |
Min |
18.6 |
27.4 |
23.8 |
5.9 |
16.9 |
-0.1 |
26 |
68 |
49.5 |
1002.3 |
1005.4 |
1003.8 |
11.1 |
21.0 |
9.0 |
|
Max |
25.4 |
35.4 |
29.8 |
14.8 |
24.7 |
2.7 |
74 |
92 |
82.5 |
1015.1 |
1018.4 |
1016.7 |
25.2 |
42.0 |
26.0 |
90.9 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
183.3 |
February |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
21.2 |
30.4 |
25.8 |
9.2 |
20.4 |
0.8 |
55.6 |
89.2 |
72.4 |
1008.5 |
1013.3 |
1010.9 |
20.1 |
24.3 |
12.7 |
13.4 |
Min |
19.6 |
23.8 |
21.7 |
2.6 |
17.5 |
-0.4 |
27 |
77 |
57.5 |
1002.9 |
1006.7 |
1004.9 |
12.4 |
15.0 |
9.0 |
|
Max |
23.5 |
37.6 |
29.7 |
15.8 |
23.0 |
2.3 |
85 |
93 |
89.0 |
1017.8 |
1020.6 |
1019.2 |
25.4 |
33.0 |
19.0 |
93.9 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
389.2 |
Season |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
20.9 |
31.9 |
26.4 |
11.0 |
19.7 |
1.2 |
44.3 |
83.1 |
63.7 |
1009.8 |
1014.4 |
1012.1 |
17.4 |
28.1 |
15.0 |
7.0 |
Min |
14.4 |
23.8 |
21.7 |
2.6 |
11.0 |
-0.4 |
1 |
56 |
30.5 |
998.2 |
1004.9 |
1001.5 |
-29.8 |
15.0 |
9.0 |
|
Max |
25.4 |
42.8 |
31.5 |
24.5 |
24.7 |
5.3 |
85 |
93 |
89.0 |
1018.2 |
1021.2 |
1019.7 |
25.4 |
54.0 |
27.0 |
93.9 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
628.5 |
Summary for summer 2019-20 from long term average for Ferny Grove, Brisbane, Queensland, Australia |
||||||||
|
Temperature |
Relative Humidity |
MSL Pressure |
Dew Point |
Wind Gust |
Wind Speed |
Rainfall |
Rainfall as Fraction of monthly average (%) |
December |
|
|
|
|
|
|
|
|
Average |
+1.8 |
-9.5 |
-0.1 |
-2.9 |
+7.1 |
+5.9 |
-73.2 |
43.3 |
Min |
+0.6 |
-9.5 |
|
-5.0 |
|
|
|
|
Max |
+3.0 |
-9.4 |
|
-0.9 |
|
|
+14.2 |
|
January |
|
|
|
|
|
|
|
|
Average |
+1.4 |
-0.6 |
+0.1 |
+1.1 |
+4.1 |
+6.0 |
38.3 |
126.4 |
Min |
+1.2 |
+1.1 |
|
+1.1 |
|
|
|
|
Max |
+1.6 |
-2.4 |
|
+1.1 |
|
|
+128.2 |
|
February |
|
|
|
|
|
|
|
|
Average |
+0.7 |
+6.0 |
-3.1 |
+2.3 |
-0.2 |
+2.7 |
227.4 |
240.5 |
Min |
+0.9 |
+9.7 |
|
+2.4 |
|
|
|
|
Max |
+0.5 |
+2.3 |
|
+2.3 |
|
|
324.0 |
|
Season |
|
|
|
|
|
|
|
|
Average |
+1.3 |
-1.4 |
-1.0 |
+0.2 |
+3.7 |
+4.9 |
192.5 |
160.7 |
Min |
+0.9 |
+0.4 |
- |
-0.5 |
- |
- |
- |
- |
Max |
+1.7 |
-3.2 |
- |
+0.8 |
- |
- |
- |
- |
Monthly averages and extremes for summer 2019-20 to Date for Ferny Grove, Brisbane, Queensland, Australia |
|||||||||||
|
Temperature |
Temperature from Long Term Avg. |
Rain total |
Rain Anomaly |
Rain days |
||||||
|
Avg Min |
Avg Max |
Low Min |
High Max |
Average |
Min |
Max |
Average |
|
|
|
Dec-19 |
19.6 |
33.0 |
14.4 |
42.8 |
26.3 |
+0.6 |
+3.0 |
+1.8 |
56.0 |
-73.2 |
7 |
Jan-20 |
21.9 |
32.2 |
18.6 |
35.4 |
27.0 |
+1.2 |
+1.6 |
+1.4 |
183.3 |
38.3 |
15 |
Feb-20 |
21.2 |
30.4 |
19.6 |
37.6 |
25.8 |
+0.9 |
+0.5 |
+0.7 |
389.2 |
227.4 |
20 |
Season |
20.9 |
31.9 |
4.4 |
41.1 |
26.4 |
+0.9 |
+1.7 |
+1.3 |
628.5 |
+192.5 |
42 |
Based on Bureau of Meteorology Climate summaries (Copyright) of which some data was obtained from. From September 2017 the Bureau of Meteorology Climate summaries were expanded to provide data from official stations in and near the Greater Brisbane “Greater capital city Statistical Area” (GCCSA).
Data Copyright Ferny Grove Weather 2019, Produced 10/4/19. Data Checking has been carried out but errors may still be present and therefore there is no assurance of correctness. Corrections may be made at a later data if errors or deficiencies are found and/or improvements in data handling techniques are made, though data with major improvements may not be updated in this summary. Data measured with professional moderate accuracy equipment. This replaced non professional equipment of low accuracy with differences in the measured data. The new equipment measures the daily average wind speed and wind run about 40 % higher. Daily rainfall and grass minimum temperature is measured using non-professional equipment of moderate accuracy.
Site Commencement data is April 15 2009 except for daily rainfall which commenced on January 1 1987. Not all variables have been measured over the entire station record. Most variables are measured over a 24 hour period ending in the evening and over a 24 hour period from midnight effective October 5 2018. Maximum temperatures are measured over the 24 hours from 9 am on the day of measurement. Minimum temperatures are measured over the 24 hours to 9 am of the day of measurement. Rainfall is measured over 24 hours to 9am and recorded on that day. This is the same as the official time standard. Some rainfall measurements are not made at 9am and is adjusted based on the automatic record. Minimum Grass Temperature is measured over an approx. 12 hour period ending in the early morning. MSL refers to Mean Sea Level, which is the standard meteorological method of measuring air pressure reduced to sea level based on both elevation and temperature. Grass Minimum Depression is the difference of the grass minimum temperature from the air temperatures and is a positive value when the grass temperature is below the air temperature.
Up until March 9 2019 automatic records as Dew Point, Average Wind Speed, Dominant Wind Direction, Wind Run, Rain Rate and Hourly Rain are measured over a 24 hour period starting at midnight and recorded for that day. This started on the 6 October 2011. The automatic record is used for some data and also may be used if data is not available/ not suitable. From March 9 2019 the automatic record became the official record instead, simplifying this process. Until replaced on 5 October 2018 the temperature and humidity sensor is under exposed so minimum temperature and maximum humidity are incorrect and low accuracy rain gauge is used which are not used as the site’s official record. This data limitation does not apply to other measurements of temperatures, air pressure and humidity, wind gust, daily and monthly rainfall and rain days elsewhere in this summary which are recorded separately and form the official record for this site. The replacement equipment is sited in more exposed locations and therefore the limitations don’t apply, though the automatic daily rainfall doesn’t form the official data for the site.
Long term averages are based on all available long period past measurements from October 2019 whilst for non automatic rainfall is based on 1987 to 2017 average from the station record, while. Prior to this the long term average for Temperature, Relative Humidity and Air pressure is based on 2009 to 2015 average from the station record and wind speed is based on the 2010 to 2018 average from station record. Wind Run is 2011 to 2018 and Rain Rate and High Hourly Rain is 2011 to 2017.
The Fraction of monthly average expresses how much has fallen in respect to the long term average listed as a percentage. The decile ranking compares the rainfall total to the historical record for the site where the record is divided into 10 equal groups. Decile 1 is the lowest 10% of the record (10th percentile) and Decile 10 (90th percentile) is the highest 10% of the record. Decile 1 is considered “very low”, decile 2 and 3 “low”, decile 4 to 7 “average”, decile 8 and 9 “high” and decile 10 “very high”.