Overnight temperatures at Ferny Grove were close to average. Daytime temperatures were close to average and the lowest in 6 years. Rainfall was close to average. Mean relative humidity was close to average, mean dew point was near average and mean air pressure was below average. There were 2 thunderstorms (3 thunder days).
Monthly mean daily minimum temperature: 20.3 ºC, equal to the long term average and 0.9 ºC lower than same month in 2020.
Monthly mean daily maximum temperature: 30.4 ºC, 0.4 ºC above average and equal to same month in 2020. This is the lowest on record for February since 29.7 ºC in 2015.
Monthly mean temperature: 25.3 ºC, 0.2 ºC above average, 2.1 ºC lower than the same month in 2020.
Lowest temperature: 17.3 ºC on 4 February 2021 at 5:38 AM. Same month in 2020 was 19.6 ºC.
Highest temperature: 36.1 ºC on 7 February 2021 at 1:12 PM. The same month in 2020 was 37.6 ºC. This is the lowest monthly maximum temperature for February on record since 35.2 ºC in 2015 on 1 February at 3:31 PM.
Lowest daily maximum temperature: 26 ºC on 2 February 2021 at 9:00 AM. Same month in 2020 was 23.8 ºC.
Highest daily minimum temperature: 23.1 ºC on 28 February 2021 at 5:45 AM. This is the lowest daily highest minimum temperature on record for February since 22.1 ºC in 2015 on 19 February 2015 at 4:05 AM. Same month in 2020 was 23.5 ºC.
February minimum temperatures were close to or below average during the month with some warm nights in the middle of the month and in the last week of the month. Minimum temperatures were 2 ºC to 3 ºC below average on the 4th and 5th and warmed to 3 ºC above average on the 8th. Cooler night followed on the 10th, 11th, 13th, 15th, 17th, and 18th at 2 ºC to 3 ºC below average and was otherwise near average. Warmer nights of 2 ºC above average on the 23rd to 25th and 3 ºC above average on the 28th but was close to average on the other days.
Maximum temperatures in February were below average during many days of the month and were above average during some days mostly occurring late in the month. The 2nd was 5 ºC below average and 2 ºC below average on the 3rd, warming to 2 ºC above average on the 6th and 5 ºC above average on the 7th. Below average temperatures of 1 ºC to 3 ºC below average then followed on the 8th to 12th. The 13th was 3 ºC above average, before cooler days between the 14th and 20th that peaked at 5 ºC below average on the 18th. The 21st to 23rd was warmer that reached 2 ºC above average on the 23rd. During the rest of the month were a mixture of near average, slightly warm and slightly cool days.
Monthly Mean Minimum Grass Temperature: 18.1 ºC (2.4 ºC lower than same month in 2020).
Lowest Minimum Grass Temperature: 14 ºC on 10 February 2021 (3.7 ºC lower than same month in 2020).
Highest Minimum Grass Temperature: 21 ºC on 25 February 2021 (3.7 ºC lower than same month in 2020).
Highest Minimum Grass Temperature Depression: 4.1 ºC on 10 February 2021 with a minimum grass temperature of 14 ºC and an air temperature of 18.1 ºC.
Lowest Minimum Grass Temperature Depression: 0.6 ºC on 14 February 2021 with a minimum grass temperature of 20.8 ºC and an air temperature of 21.4 ºC.
Monthly mean daily minimum MSL pressure: 1008.5 hPa (equal to same month in 2020). This is the equal lowest for February equalling 1008.5 hPa in 2020.
Monthly mean daily maximum MSL pressure: 1012.8 hPa (0.5 hPa lower than same month in 2020). This is the lowest on record for February exceeding the previous record low of 1013.3 hPa in 2020.
Mean MSL pressure: 1010.7 hPa (2.2 hPa below average, 0.2 hPa lower than same month in 2020). This is the lowest on record for February exceeding the previous record low of 1010.9 hPa in 2020.
Lowest MSL pressure: 1000.8 hPa on 21 February 2021 at 3:27 PM. The same month in 2020 saw 1002.9 hPa.
Highest MSL pressure: 1017.1 hPa on 18 February 2020 at 10:13 AM. The same month in 2020 saw 1020.6 hPa. This is the lowest February monthly maximum air pressure on record exceeding the previous record low of 1019.7 hPa in 2014 on 9 February at 8:06 AM.
Monthly mean daily minimum relative humidity: 55.2 % (6.4 % lower than same month in 2020 and 0.4 % above average).
Monthly mean daily maximum relative humidity: 93.5 % (1.7 % lower than same month in 2020 and 1.5 % above average).
Mean relative humidity: 74.3 % (4.1 % lower than same month in 2020 and 1 % above average).
Lowest relative humidity: 37 % on 21 February 2021 at 1:01 PM (4 % higher than this month in 2020).
Highest relative humidity: 98 % on 23 February 2021 at 6:31 AM (1 % lower than this month in 2020).
Monthly mean daily minimum dew point: 18 ºC (0.2 ºC below average).
Monthly mean daily maximum dew point: 22.4 ºC (0.5 ºC above average). This is the second highest mean maximum dew point for February and the highest since the current record high of 23.7 ºC in 2020.
Monthly mean dew point: 20.2 ºC (0.2 ºC above average).
Lowest dew point: 14.1 ºC on 3 February 2021 at 4:34 PM.
Highest dew point: 24.9 ºC on 23 February 2021 at 1:20 PM. This is the lowest monthly maximum dew point on record for February since 24.2 ºC in 2015 on 22 February at 3:58 PM.
Highest wind gust: 39 km/hr on 17 February 2021 at 1:42 PM.
Highest wind speed: 18 km/hr on 16 February 2021 at 5:45 PM (Light Force Wind). This is the lowest monthly maximum wind speed for February on record, exceeding the previous record low of 18.1 km/hr in 2012 on 20 February at 5:35 PM.
Total Wind Run: 2470.7 km (594.9 km lower than same month in 2020), 329.1 km below average and 0.9 % below average.
Mean wind speed: 1.8 km/hr (2.3 km/hr lower than this month in 2021), 2.1 km/hr below the long term average). This is the second lowest on record for February and the lowest since the current record low of 0.9 km/hr in 2012.
Daily Mean Maximum Wind Gust: 24.1 km/hr (0.2 km/hr lower than this month in 2020), 0.1 km/hr above average and 0.2% above average. This is the second lowest daily mean maximum wind gust on record for February and the lowest since the current record low of 22.2 km/hr in 2012.
Daily Mean Maximum Wind Speed: 12.5 km/hr, 0.2 km/hr lower than this month in 2020), 2.7 km/hr above average and 27.5 % above average. This is the second lowest on record for February and lowest since the current record low of 10.1 km/hr in 2012.
Dominant Direction: SE (E this month last year).
Rainfall total: 126.2 mm, 35.6 mm above average (78 % of long term average), 9.8 mm below the long term median and 82.1 % of the site median. This total is lower than this month in 2020 which was 389.2 mm. Automatic rain gauge was 103.2 mm (-18.2 % of manual gauge).
Highest daily rainfall total: 33.5 mm on 2 February 2021.
Number of rain days: 14 days, 6 less than same month in 2020 and 2.2 days above average.
Highest rainfall rate: 129.4 mm/hr on the 17 February 2021 at 2:31 PM.
Highest hourly rainfall total: 17.6 mm on the 2 February 2021 at 8:40 AM.
In the first few days of the month were showers with moderate to heavy falls before mostly light showers and rain until the middle of the month on some days. Further moderate to heavy falls from showers in the middle and later in the month along with some thunderstorm activity on the 19th, 22nd and 23rd.
There was 0 days of morning dew.
Cloudy and became cold during the 2nd as the temperature rose slowly.
The maximum temperature was reached in the late morning before falling in the afternoon on the 8th.
Cloudy at times on the 10th with the temperature falling from the mid-morning.
Cloudy or mostly cloudy on the 13th, 14th and 16th to 20th and was cold on the 17th and 19th.
The minimum temperature was reached very early on the 16th, before rising during the remainder of the early hours.
Sunny and hot on the 22nd.
Mostly sunny until cloud increased before an evening thunderstorm on the 23rd.
Cloudy or cloudy at times on the 25th and 27th.
The first half of the month saw moist onshore flow that was accompanied by inland troughs extending into the region with instability before a trough moved through the region on the 13th and 14th and weakened the ridge. High pressure ridging with moist and unstable onshore flow combined with a trough that developed off the northern New South Wales coast that extended dry south-westerly flow on the 21st and 23rd. High pressure riding returned late in the month and with some instability from an inland trough.
Long period rainfall totals compared with January 2021 reduced further for most periods and were below average or well below average. 6 monthly rainfall reduced slightly by 20 mm below average to 94.7 mm below average and 9 monthly rainfall slipped by 45 mm to 108.6 mm below average. 12 monthly rainfall was slightly above average in January but fell to 256.4 mm below average in February. 18 month rainfall fell slightly to 167.8 mm below average while the 24 month, 36 month and 48 month rainfall totals fell by a large amount. The deficiencies compared to the long term average for 24 month rainfall fell from -163.9 mm to -312 mm, 36 month rainfall fell from -442.6 mm to -344.6 mm and 48 month rainfall fell from -68.8 mm to -360.3 mm. Compared with the same period in 2020 rainfall deficiencies have deteriorated, in contrast to January where the rainfall totals were less deficient than in January 2020. When compared with the start of summer rainfall totals worsened for all periods except for 24 month rainfall that improved by 54 mm but was still well below average.
For February there were 5 existing records exceeded or equalled, along with 7 records that was highest/lowest in at least 5 years.
For more detailed analysis refer to the “Monthly Meteorological Report for February 2021”
Summary of Averages and Extremes for February 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 |
20.3 |
30.4 |
25.3 |
10.1 |
18.1 |
2.1 |
55.2 |
93.5 |
74.3 |
1008.5 |
1012.8 |
1010.7 |
20.2 |
24.1 |
12.5 |
4.5 |
Min |
17.3 |
26.0 |
22.8 |
5.5 |
14.0 |
0.6 |
37 |
82 |
65 |
1000.8 |
1007.0 |
1004.4 |
14.1 |
12.0 |
7.0 |
|
Max |
23.1 |
36.1 |
28.6 |
15.3 |
21.0 |
4.1 |
83 |
98 |
91 |
1014.1 |
1017.1 |
1015.6 |
24.9 |
39.0 |
18.0 |
33.5 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
126.2 |
Summary for February 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 |
+0.2 |
+1.0 |
-2.2 |
+0.2 |
+0.1 |
+2.7 |
-35.6 |
78.0 |
Min |
-0.0 |
+0.4 |
|
-0.2 |
|
|
|
|
Max |
+0.4 |
+1.5 |
|
+0.5 |
|
|
+61.0 |
|
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 |
15 |
Feb-21 |
20.3 |
30.4 |
17.3 |
36.1 |
25.3 |
-0.0 |
+0.4 |
+0.2 |
126.2 |
-35.6 |
14 |
YTD |
20.1 |
30.2 |
16.6 |
36.6 |
25.1 |
-0.3 |
-0.2 |
-0.5 |
222.0 |
+77.0 |
29 |
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 23/6/21. 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”.