At Ferny Grove in January overnight temperature were well above average and the highest in 10 years. Daytime temperatures were well above average. Rainfall at Ferny Grove was above average, the highest in 5 years as a result of showers and thunderstorms in the second half of the month. Mean relative humidity was close to average and mean air pressure was close to average. There were 7 thunderstorms (8 thunder days).
Mean minimum temperature: 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.
Mean maximum temperature: 32.2 ºC, 1.6 ºC above average and 0.2 ºC higher than same month in 2019.
Mean temperature: 27 ºC, 1.4 ºC above average and 0.6 ºC higher than same month in 2019.
Lowest temperature: 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 and the highest since the current record high of 21 ºC in 2010 on 21 January
Highest temperature: 35.4 ºC on 29 January 2020 at 12:56 PM. The same month in 2019 was 34.3 ºC.
Lowest maximum temperature: 27.4 ºC on 16 January 2020 at 11:52 AM. This month in 2019 was 22.9 ºC.
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.
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
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.
Mean minimum grass temperature: 20.6 ºC (1.6 ºC higher than same month in 2019).
Lowest Minimum Grass Temperature: 16.9 ºC on 2 January 2020 (0.2 ºC higher than same month in 2019).
Highest 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: 2.7 ºC on 2 January 2020 with a minimum grass temperature of 19.6 ºC and an air temperature of 16.9 ºC.
Lowest Minimum Grass Temperature Depression: -0.1 ºC on 16 January 2020 with a minimum grass temperature of 21.5 ºC and an air temperature of 21.4 ºC.
Mean minimum MSL pressure: 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.
Mean maximum MSL pressure: MSL Pressure: 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.
Mean MSL pressure: 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.
Lowest MSL pressure: 1002.3 hPa on 18 January 2020 at 3:59 PM. The same month in 2019 saw 1010.1 hPa.
Highest MSL pressure: 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 on record
Mean minimum relative humidity: 45.1 % (2.9 % lower than same month in 2019 and 1.1 % above average).
Mean maximum relative humidity: 76.5 % (11.2 % lower than same month in 2018 and 9.4 % below average). 83.7 % (1.9 % lower than same month in 2019 and 2.4 % below average). This is second lowest on record for January on record.
Mean relative humidity: 64.4 % (12.6 % lower than same month in 2019 and 0.6 % below average).
Lowest relative humidity: 26 % on 5 January 2020 at 11:54 AM (3 % higher than this month in 2019).
Highest relative humidity: 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.
Monthly mean minimum dew point: 16.6 ºC (1.1 ºC above average). This is the second lowest monthly mean minimum dew point for January on record
Monthly mean maximum dew point: 21.2 ºC (1.1 ºC above average).
Monthly mean dew point: 18.9 ºC (1.1 ºC above average). This is the second lowest monthly mean dew point for January
Lowest dew point: 11.1 ºC on 10 January 2020 at 12:18 PM.
Highest dew point: 25.2 ºC on 20 January 2020 at 10:21 AM.
Highest wind gust: 42 km/hr on 23 January 2020 at 11:35 AM. The maximum wind gust this month in 2019 was 37 km/hr.
Highest wind speed: 26 km/hr on 19 January 2020 at 12:00 PM (Moderate Force Wind).
Total Wind Run: 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.
Mean wind speed: 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.
Daily Mean Maximum Wind Gust: 28.5 km/hr (1.7 km/hr higher than this month in 2019), 4.1 km/hr above average and 16.7% above average.
Daily Mean Maximum Wind Speed: 15.7 km/hr, 2 km/hr higher than this month last year, 6 km/hr above average and 62.4 % above average.
Dominant Direction: NE (NE this month last year).
Rainfall total: 183.3 mm, 38.3 mm above average (126.4 % of long term average), 57.9 mm above the long term median and 144.6% of the site median. This is higher than this month last year which was 11.2 mm. Automatic rain gauge was 168.6 mm (-8 % of manual gauge).
Highest daily rainfall total: 90.9 mm on 18 January 2020. This is the highest for January highest daily rainfall on record since 271.3 mm on 28 January 2013 (Ex Tropical Cyclone Oswald).
Number of rain days: 15 days, 6 greater than this month in 2019 and 4.9 days above average.
Highest rainfall rate: 167 mm/hr on the 19 January 2020 at 11:49 AM. This is the second monthly and daily rainfall rate for January on record.
Highest hourly rainfall total: 33.6 mm on the 17 January 2020 at 11:14 PM. This is the second highest January highest hourly rain on record.
January saw dry weather in the first 10th days before showers and thunderstorms with heavy falls
During Decembers there were showers and storms with low or no rainfall early in the month. There were some showers on the 12th and 15th before showers and thunderstorms between the 17th and 26th. A slow moving severe thunderstorm with heavy falls was followed by showers with some heavy falls in the late evening of the 17th and overnight into the early morning of 18th.
There were 2 days of morning dew.
Smoke haze was observed on 6 days (in first 11 days of the month); a significant reduction in past months due to the bushfire weather conditions
A very settled weather pattern in the first 10 days of the month. A much more active pattern developed from mid-month with coastal troughs followed by an upper level trough drawing moisture across the state aided by a tropical low pressure system and surface trough further inland.
Low humidity occurring during the previous several months was not present in these more typical conditions in January. Large rainfall deficiencies eased to some degree with the above average rainfall and are no longer in the lowest 20% of records.
For November there were 3 existing records exceeded or equalled, along with 6 records that was highest/lowest in at least 5 years.
For more detailed analysis refer to the “Monthly Meteorological Report for January 2020”
Summary of Averages and Extremes for January 2020 for Ferny Grove, Brisbane, Queensland, Australia |
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|
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 |
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 |
50 |
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 |
83 |
1015.1 |
1018.4 |
1016.7 |
25.2 |
42.0 |
26.0 |
90.9 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
183.3 |
Summary for January 2020 from long term average for Ferny Grove, Brisbane, Queensland, Australia |
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|
Temperature |
Relative Humidity |
MSL Pressure |
Dew Point |
Wind Gust |
Wind Speed |
Rainfall |
Rainfall as Fraction of monthly average (%) |
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 |
|
Monthly averages and extremes for Year of 2020 to Date for Ferny Grove, Brisbane, Queensland, Australia |
|
|
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|
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-20 |
21.9 |
32.2 |
18.6 |
35.4 |
27.0 |
+1.2 |
+1.6 |
+1.4 |
183.3 |
+38.3 |
15 |
YTD |
21.9 |
32.2 |
18.6 |
35.4 |
27.0 |
+1.2 |
+1.6 |
+1.4 |
183.3 |
+38.3 |
15 |
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 2/2/20. 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”.