At Ferny Grove overnight temperatures were above average and were the highest in 10 years. Daytime temperatures were well above average. Rainfall at Ferny Grove was well above average and the highest in 5 years. Mean relative humidity was near average, mean air pressure was below average, mean dew point was below average and wind speed above average. There were 20 thunderstorms.
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.
Seasonal mean maximum temperature: 31.9 ºC, 1.7 ºC above average and 0.7 ºC higher than the same season in 2018-19.
Seasonal mean temperature: 26.4 ºC, 0.7 ºC above average and 0.6 ºC higher than same season in 2018-19.
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.
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. 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.
Lowest maximum temperature: 23.8 ºC on 6 February 2020 at 12:39 PM. This month in 2019 was 25.6 ºC and this season in 2018-19 was 23.9 ºC.
Highest minimum temperature: 25.4 ºC on 23 January 2020 at 5:07 AM. 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, and the highest since the current record high of 26.8 ºC in 2016-17 on 21 January at 11:10 PM.
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 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.
Seasonal Mean Minimum Pressure: 1009.8 hPa (1.6 hPa lower than same season in 2018-19).
Seasonal Mean Maximum Pressure: 1014.4 hPa (2.3 hPa lower than same season in 2018-19).
Seasonal Mean Pressure: 1014.4 hPa (2.3 hPa lower than same season in 2018-19).
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. For summer this is the lowest seasonal minimum air pressure since 997.3 hPa on 28 January 2013 at 3:57 AM (Ex Tropical Cyclone Oswald).
Seasonal Highest MSL 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.
Seasonal Mean Minimum Relative 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.
Seasonal Mean Maximum Relative 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.
Seasonal Mean Relative 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.
Lowest Seasonal Humidity: 1 % on 5 December 2019 at 9:21 AM (12 % lower than this month in 2018). 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.
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). 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.
Dew point
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.
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.
Seasonal mean 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.
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.
Highest dew point: 25.4 ºC on 15 February 2020 at 1:57 PM.
Maximum Wind Gust: 54 km/hr on 11 December 2019 at 10:07 AM. The maximum wind gust this month in 2018 was 48 km/hr and this season in 2018-19 was 48 km/hr.
Maximum Wind Speed: 27 km/hr on 2 December 2019 at 10:55 AM (Moderate Force Wind). This season in 2018 was 45.7 km/hr. For summer this is the second lowest seasonal maximum wind speed.
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.
Seasonal Mean Daily 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.
Seasonal Mean Daily 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.
Dominant Direction: E (SE this season in 2018-19).
Rainfall
Rainfall total: 628.5 mm, 192.5mm above average (160.7 % of long term average), 257.5 mm above the long term median and 169.4 % of the site median. This ranks as decile 9/ 84th percentile and as high. This is higher than this season in 2018-19 which was 131.1 mm. Automatic rain gauge was 536.4 mm (-17.1 % of manual gauge).
Highest daily rainfall total: 93.9 mm on 7 February 2020.
Number of rain days (0.1 mm or greater): 42 days, 7 greater than same season in 2018-19 and 6.6 days below average.
Highest rainfall rate: 188.8 mm/hr on the 24 December 2019 at 7:51 PM.
Highest hourly rainfall: 33.6 mm on the 17 January 2020 at 11:14 PM.
There was 20 thunderstorms, with 22 days with thunder, along with 9 nearby thunderstorms.
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.
January saw dry weather at Ferny Grove in the first 10 days before showers and thunderstorms with heavy falls.
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.
There were 0 days of morning dew.
Smoke haze was observed on 16 days caused by continued bushfire weather conditions across the region
Persistent low pressure troughs over the interior of the state produced a dry and stable air mass during much of the month with many days of smoke haze.
The trough produced unstable conditions during the middle of the month and a more active upper-level pattern brought the showers and storms later inn the month.
Long period rainfall totals of between 6 and 24 months exhibited very large negative anomalies compared to the long term average. Many of these records through to December are in the lowest 10% of records.
For November there were 13 existing records exceeded or equalled, along with 8 records that was highest/lowest in at least 5 years.
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 January there were 3 existing records exceeded or equalled, along with 6 records that was highest/lowest in at least 5 years.
There were 8 days of morning dew.
Warm and sunny in the first several days of the month before
Persistent surface troughs further inland along with a strengthening coastal trough near the southern Queensland coast brought an active period of showers and thunderstorms with some heavy falls from the 4th to the 14th. This brought many cool and cloudy days.
Warmer weather later in the month with showers and thunderstorms continuing during the rest of the month unstable conditions remained aided by moist onshore winds along the coast.
Following rain in January and in this month rainfall deficiencies in the short term of 6 to 12 months have improved further and was above average.
For February there were 6 existing records exceeded or equalled, along with 7 records that was highest/lowest in at least 5 years.
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 |
Data copyright Ferny Grove Weather 2020, Produced 10/4/2019. 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. Data measured with low accuracy equipment, mostly replaced with professional moderate accuracy equipment from October 5 except for daily rainfall which is measured using non-professional equipment with 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 effective October 5 2019 this is the 24 hours from midnight. 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. This is same to the official time standards and measured in degrees C. Rainfall is measured over 24 hours to 9am and recorded on that day. This is the same as the official time standard and measured in millimetres. 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.
Dew Point, Average Wind Speed, Dominant Wind Direction, Wind Run, Rain Rate and Hourly Rain are measured automatically over a 24 hour period starting at midnight and recorded for that day. This started on the 6 October 2011. Until replaced from 5 October 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. However the automatic record for some data may be used if data is not available/ not suitable.
Long term averages are based on all available long period past measurements. 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. Long term average for rainfall is based on 1987 to 2017 average from the station record. The Fraction of monthly average expresses how much has fallen in respect to the long term average listed as a percentage.