Brisbane, Queensland, Australia, Latitude 27°S 23' 52", Longitude 152° E 55' 35", Elevation 76 m
Tue 30 May 2023 10:20:19 am: Temperature: 20.6 °C, Humidity: 44 %, Wind speed: 5 km/h, Wind Gust: 10 km/h, Rain today: 0.0 mm, MSLP: 1024.7 hPa
Website under continual development from 11 years of weather data. Please contact us if you find issues or like to provide feedback.
Data updating resolved outages: Data on this website did not update for 6 hours between 1:30 pm and 8:40 pm on Monday 10 April 2023 during an unplanned outage caused by the Network Service Provider that appears to have been resolved. The missing data has now been populated from our developmental system which continued to run. Apologies for any inconvenience this may cause.
At Ferny Grove in May overnight and daytime temperatures were close to average. Daytime temperatures were the lowest in 6 years. Rainfall was close to average but was the wettest in 6 years with most rainfall occurring in the first half of the month. Mean relative humidity was above average, mean dew point was above average and mean air pressure was below average. There were 2 thunderstorms (3 thunder days).
Monthly mean daily minimum temperature: 12.1 ºC, 0.2 ºC below average and 0.6 ºC lower than same month in 2020.
Monthly mean daily maximum temperature: 24.2 ºC, equal to the long term average and equal to same month in 2020. This is the lowest on record for May since 24.1 ºC in 2015.
Monthly mean temperature: 18.2 ºC, 0.1 ºC below average, 2 ºC lower than the same month in 2020. This is the lowest on record for May since 18.2 ºC in 2015.
Lowest temperature: 6.1 ºC on 17 May 2021 at 6:25 AM. Same month in 2020 was 11.9 ºC.
Highest temperature: 29.3 ºC on 10 May 2021 at 1:21 PM. The same month in 2020 was 28.1 ºC. This is the highest monthly and daily maximum temperature for May on record exceeding the previous record high of 29 ºC in 2016 on 3 May at 3:01 PM.
Lowest daily maximum temperature: 18.2 ºC on 5 May 2021 at 3:43 PM. Same month in 2020 was 15.6 ºC.
Highest daily minimum temperature: 17 ºC on 12 May 2021 at 6:46 AM. Same month in 2020 was 15.6 ºC.
Minimum temperatures in May were above average during most days in the first half of the month before near or below average temperatures during the remainder of the month. The 1st to 3rd and 5th were 3 ºC to 4 ºC above average and was 2 ºC to 3 ºC above average on the 8th to 13th that peaked at 5 ºC above average on the 12th. The 15th to 18th was 4 ºC to 6 ºC below average, followed by a warmer night of 2 ºC above average on the 19th and 2 ºC to 3 ºC below average on the 20th and 21st. It was 2 ºC below average on the 26th and 4 ºC to 5 ºC below average on the 28th and 29th.
May maximum temperatures were above average during most days in the first half of the month and then most days during the rest of the month were near or below average. The 1st was 4 ºC below average, 2 ºC above average on the 3rd and 4th and 6 ºC below average on the 5th. A warm period between the 6th and 11th that peaked at 5 ºC above average on the 10th. With the cooler days from the middle of the month it was 2 ºC below average on the 16th, 19th and 28th and 2 ºC to 3 ºC below average on the 30th and 31st. The 26th however was 2 ºC above average.
The mean year to date temperature of 22.6 ºC was 0.2 ºC below average and the lowest for January to May since 22.2 ºC in 2013.
Monthly Mean Minimum Grass Temperature: 10 ºC (0.9 ºC lower than same month in 2020).
Lowest Minimum Grass Temperature: 4.2 ºC on 17 May 2021 (2.6 ºC lower than same month in 2020). This coincided with the lowest minimum air temperature of 6.1 ºC for the month.
Highest Minimum Grass Temperature: 15.1 ºC on 12 May 2021 (1 ºC higher than same month in 2020). This coincided with the highest minimum air temperature of 17 ºC for the month.
Highest Minimum Grass Temperature Depression: 3.8 ºC on 14 May 2021 with a minimum grass temperature of 8.9 ºC and an air temperature of 12.7 ºC.
Lowest Minimum Grass Temperature Depression: 3.8 ºC on 14 May 2021 with a minimum grass temperature of 8.9 ºC and an air temperature of 12.7 ºC.
Monthly mean daily minimum MSL pressure: 1017 hPa (0.8 hPa lower than same month in 2020). This is the lowest for May since 1014.9 hPa in 2016.
Monthly mean daily maximum MSL pressure: 1021.1 hPa (1 hPa lower than same month in 2020). This is the lowest on record for May since 1019.9 hPa in 2016.
Mean MSL pressure: 1019.1 hPa (0.4 hPa below average, 0.8 hPa lower than same month in 2020). This is the lowest on record for May since 1017.4 hPa in 2016.
Lowest MSL pressure: 1006.3 hPa on 6 May 2021 at 2:41 PM. The same month in 2020 saw 1008 hPa. This is the lowest monthly minimum air pressure for May since 1005.8 hPa in 2016 on 27 May at 2:55 PM.
Highest MSL pressure: 1027.3 hPa on 19 May 2020 at 9:38 AM. The same month in 2020 saw 1028.1 hPa. This is the second lowest May monthly maximum air pressure on record and the lowest since the current record low of 1026 hPa in 2010 on 2 May at 10:00 AM.
Monthly mean daily minimum relative humidity: 52.8 % (6.3 % higher than same month in 2020 and 0.2 % below average).
Monthly mean daily maximum relative humidity: 94.6 % (7.9 % higher than same month in 2020 and 5.6 % above average). This is the highest on record for May exceeding the previous record high of 93.6 % in 2012.
Mean relative humidity: 73.7 % (7.1 % higher than same month in 2020 and 2.9 % above average). This is the second highest on record for May and the highest since the current record high of 74.5 % in 2017.
Lowest relative humidity: 22 % on 17 May 2021 at 11:12 AM (1 % lower than this month in 2020). This is the second lowest monthly minimum humidity for May on record and the lowest since the current record low of 11 % in 2019 on 31 May at 2:05 PM.
Highest relative humidity: 98 % on 26 May 2021 at 7:21 AM (equal to same month in 2020).
Monthly mean daily minimum dew point: 10 ºC (0.1 ºC above average).
Monthly mean daily maximum dew point: 15.9 ºC (1 ºC above average).
Monthly mean dew point: 12.9 ºC (0.6 ºC above average).
Lowest dew point: -1.3 ºC on 17 May 2021 at 11:12 AM. This is the second lowest monthly minimum dew point for May on record and the lowest since the current record low of -11.1 ºC in 2019 on 31 May at 2:10 PM.
Highest dew point: 20.6 ºC on 12 May 2021 at 1:35 PM.
Highest wind gust: 31 km/hr on 12 May 2021 at 4:31 PM. This is the lowest maximum wind gust on record for May on record, exceeding the previous record low of 34.8 km/hr in 2012 on 28 May at 12:15 PM.
Highest wind speed: 16 km/hr on 13 May 2021 at 12:14 PM (Light Force Wind). This is the lowest monthly maximum wind speed for May on record exceeding the previous record low of 17.2 km/hr in 2012 on 29 May at 11:50 AM.
Total Wind Run: 1751 km (1104.8 km lower than same month in 2020), 280.9 km below average and 15.6 % below average.
Mean wind speed: 1.2 km/hr (2.7 km/hr lower than this month in 2020), 1.3 km/hr below the long term average). This is the equal second lowest on record for May and the equal lowest since 1.2 km/hr in 2014.
Daily Mean Maximum Wind Gust: 21.6 km/hr (2.8 km/hr lower than this month in 2020), 2.5 km/hr above average and 15.3 % above average. This is the lowest daily mean maximum wind gust on record for May since 20.9 km/hr in 2014.
Daily Mean Maximum Wind Speed: 10.6 km/hr, 1.7 km/hr lower than this month in 2020), 3.1 km/hr above average and 42% above average. This is the second lowest on record for May and lowest since the current record low of 8.5 km/hr in 2012.
Dominant Direction: S (S this month last year).
Rainfall total: 99.5 mm, 3.5 mm below average (96.6 % of long term average), 52.2 mm above the long term median and 220.4 % of the site median. This total is higher than this month in 2020 which was 12.1 mm. Automatic rain gauge was 90 mm (-9.5 % of manual gauge).
Highest daily rainfall total: 28.6 mm on 13 May 2021.
Number of rain days: 7 days, 1 day less than same month in 2020 and equal to the long-term average.
The year to date total rainfall was 748.9 mm (121.1 mm above average and 19.3 % above average).
The year to date number of rain days of 66 was 14 days above the long term average.
Highest rainfall rate: 217.4 mm/hr on the 12 May 2021 at 4:34 PM. This is the highest monthly and daily rainfall rate for May on record exceeding the previous record high of 111.8 mm/hr in 2019 on 4 May at 2:11 PM.
Highest hourly rainfall total: 27.2 mm on the 12 May 2021 at 4:57 PM. This is the second highest hourly rain for May on daily and monthly basis and the highest since the current record high of 38.8 mm in 2015 on 1 May at 5:15 PM.
On the 1st and 2nd were showers with some moderate to heavy falls. Further rainfall occurred on the 4th and 5th with light showers tending to rain after a mild thunderstorm with brief heavy falls on the 5th. Overnight on the 11th and 12th was light to moderate thundery rain with a thunderstorm. In the afternoon of the 12th was a severe thunderstorm with fierce electrical activity with 20 mm of rainfall occurring in 12 minutes. Almost all of the rainfall fell in the first half of the month.
There was 7 days of morning dew.
Cloudy or mostly cloudy on the 1st and 2nd with elevated relative humidity. Cold in the afternoon of the 1st.
Variable temperature from the mid-morning to mid-afternoon on the 3rd.
Early morning mist and sunny early on the 4th before increasing cloud.
Cloudy morning of the 5th and clearing in the afternoon, with elevated daytime relative humidity and the temperature fell in the morning becoming cold in the morning and afternoon.
Mostly sunny on 6th after the minimum temperature was reached very early in the day.
Sunny morning on the 7th and 8th.
Cloudy periods on the 9th.
Mostly sunny on the 11th after a hot night, followed by a hot evening.
Hot early on the 12th, with mist, then cloudy and increasing in the afternoon with severe thunderstorm. High daytime relative humidity.
The 13th, 14th and 15th and 19th were sunny.
Low humidity at times on the 14th, in the evening of the 15th and at times in the first half of the 16th.
Cold early on the 17th. Very low relative humidity in morning and afternoon.
Smoke haze on 18th from back burning at Enoggera.
Sunny or mostly sunny on the 20th, 22nd and 23rd.
Variable daytime temperature on the 20th and rather variable in afternoon of the 25th.
Sunny morning on the 24th and 25th and sunny or mostly sunny day on the 26th to 28th.
Cold morning and smoke haze on the 28th and smoke haze on the 29th with low relative humidity early in the day.
Mostly sunny morning on 30th and mostly sunny on 31st with low relative humidity early in the day.
The 1st to 4th saw a ridge of high pressure combine with a weak coastal trough by the coast that moved away on the 3rd and an upper trough that shifted east over the region to bring instability on the 1st and 2nd. Another surface trough and cold front moved across associated with an upper level low pressure system over New South Wales clearing on the 5th that brought further instability on the 4th and 5th. A low pressure system combined with a weak ridge extended a dry and stable air mass in the days followed the passage of the front. A weak upper trough and coastal trough brought some instability on the 9th and 10th before an upper level trough amplified while shifting eastwards while deepening the coastal trough on the 11th and 12th. This brought unstable conditions including severe thunderstorms that occurred on the 12th. A new ridge extended a cool and dry air mass from the 13th and the wind flow tended onshore from the 20th. A weak upper trough moved across on the 23rd with some instability. The ridge decayed on the 25th as a trough moved east that cleared on the 27th with settled weather with the trough before a new ridge with further cool and dry air followed from the 27th.
Long period rainfall totals remained above average for the rainfall periods up to 18 months and improved for some of the longer periods, though 36 monthly rainfall remained significantly below average. 6 monthly rainfall improved by 82.3 mm in April to 154.1 mm above average, 9 monthly rainfall improved by 23.8 mm to 110 mm above average and 12 monthly rainfall improved by 88.8 mm to 96.1 mm above average. 18 month rainfall improved by 72.6 mm to 165.6 mm above average. 24 monthly rainfall returned to being in the positive from 14 mm below average to 9.8 mm above average. 36 month was the only period that was below average being 165 mm below average which was the same as the previous month. 48 monthly rainfall slipped slightly from 24.9 mm above average to 2.2 mm above average. Compared with the same period in 2020 the long period rainfall totals improved and significantly for some periods but have worsened for 36 and 48 monthly totals.
For May there were 6 existing records exceeded or equalled, along with 12 records that was highest/lowest in at least 5 years.
For more detailed analysis refer to the “Monthly Meteorological Report for May 2021”
Summary of Averages and Extremes for May 2021 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 |
Average |
12.1 |
24.2 |
18.2 |
12.1 |
10.0 |
2.2 |
52.7 |
94.7 |
73.7 |
1016.8 |
1020.9 |
1018.8 |
13.1 |
21.4 |
10.5 |
3.2 |
Min |
6.1 |
18.2 |
14.7 |
3.1 |
4.2 |
0.7 |
22 |
85 |
59 |
1006.3 |
1010.8 |
1008.6 |
-1.3 |
14.0 |
5.0 |
|
Max |
17.0 |
29.3 |
22.0 |
17.1 |
15.1 |
3.8 |
86 |
98 |
92 |
1024.6 |
1027.3 |
1026.0 |
20.6 |
31.0 |
16.0 |
28.6 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
99.5 |
Summary for May 2021 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 (%) |
Average |
-0.1 |
+2.9 |
-0.4 |
+0.6 |
+2.5 |
+2.9 |
-3.5 |
96.6 |
Min |
-0.2 |
+0.2 |
|
+0.1 |
|
|
|
|
Max |
+0.0 |
+5.6 |
|
+1.0 |
|
|
+61.8 |
|
Monthly averages and extremes for Year of 2021 to Date for Ferny Grove, Brisbane, Queensland, Australia |
|||||||||||
|
Temperature |
Temperature Anomaly from Long Term Avg. |
Rain total |
Rain Anomaly |
Rain days |
||||||
|
Avg Min |
Avg Max |
Low Min |
High Max |
Average |
Min |
Max |
Average |
|
|
|
Jan-21 |
20.0 |
29.9 |
16.6 |
36.6 |
24.9 |
-0.6 |
-0.8 |
-0.7 |
95.8 |
-49.2 |
19 |
Feb-21 |
20.3 |
30.4 |
17.3 |
36.1 |
25.3 |
-0.0 |
+0.4 |
+0.2 |
126.2 |
-35.6 |
14 |
Mar-21 |
19.4 |
28.7 |
14.8 |
34.6 |
24.0 |
+0.2 |
-0.0 |
+0.1 |
297.3 |
+173.1 |
17 |
Apr-21 |
14.7 |
26.5 |
9.1 |
33.7 |
20.6 |
-1.3 |
+0.0 |
-0.7 |
130.1 |
+36.3 |
9 |
May-21 |
12.1 |
24.2 |
6.1 |
29.3 |
18.2 |
-0.2 |
+0.0 |
-0.1 |
99.5 |
-3.5 |
7 |
YTD |
17.3 |
27.9 |
6.1 |
36.6 |
22.6 |
-0.4 |
-0.1 |
-0.2 |
748.9 |
+121.1 |
66 |
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 2020, Produced 27/8/21. 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”.