At Ferny Grove in winter overnight and daytime temperatures were above average. Rainfall was close to average at Ferny Grove (101.8 % of the long-term median). Mean relative humidity was close to average, above average mean air pressure, mean dew point was close to average and wind speed was above average. There were 0 thunderstorms.
Seasonal mean minimum temperature: 10.3 ºC, 0.9 ºC above average and 0.2 ºC higher than the same season in 2019.
Seasonal mean maximum temperature: 22.9 ºC, 1.1 ºC above average and 0.5 ºC lower than the same season in 2019.
Seasonal mean temperature: 16.6 ºC, 0.5 ºC above average and 0.1 ºC lower than same season in 2019.
Lowest temperature: : 4.2 ºC on 25 August 2020 at 6:16 AM. Same month in 2019 was 6.2 ºC and same season in 2019 was 4.4 ºC.
Highest temperature: 27.9 ºC on 19 August 2020 at 1:40 PM. The same month and season in 2019 was 28.6 ºC. For winter this is the lowest seasonal maximum temperature on record since 27.8 ºC in 2015 on 26 August at 3:26 PM.
Lowest maximum temperature: 16.7 ºC on 23 July 2020 at 1:30 PM. This month in 2019 was 20.2 ºC and this season in 2019 was 16.3 ºC. For winter this is the second highest seasonal lowest maximum temperature on record, the highest since the current record high of 16.9 ºC in 2017 on 13 June at 11:57 AM
Highest minimum temperature: 16.3 ºC on 15 August 2020 at 6:47 AM.. Same month in 2019 was 14.6 ºC.
Minimum temperatures in June saw two periods of cool nights in the first week of the month returning at the end of the month. The first cool period saw temperatures that were 1 ºC to 2 ºC below average on the 3rd to 9th. This was followed by a 11 day warm period that was mostly between 2 ºC to 5 ºC above average, peaking at 8 ºC above average on the 14th. From the 23rd were cooler nights that were up to 5 ºC below average, though some days were 1 ºC to 2 ºC below average.
July minimum temperatures saw several warm nights during the middle of the month and later in the month with comparatively low number of cool nights mostly in two periods. The first cool period was on the 5th to 7th of temperature of 3 ºC to 4 ºC below average. Between the 9th and 13th minimum temperatures were 3 ºC to 5 ºC above average. The second cool period was between the 17th and 20th. The 21st to 28th was above average as much as 7 ºC above average before cooling closer to average at the end of the month.
Minimum temperatures during August saw many warm nights throughout the month with comparatively lesser number of cool or near average temperatures. The 1st was 3 ºC above average, close to average in the following days with some slightly cool nights before temperatures of 5 ºC above average on the 7th and 8th. The 12th to 16th was 2 ºC to 7 ºC above average, which then cooled briefly before temperatures of 2 ºC to 5 ºC above average on the 19th to 21st. A cool period followed on the 25th to 28th which was 1 ºC to 5 ºC below average.
June maximum temperatures were predominately above average with most days in the first half of the month above average, which continued during the rest of the month, which was accompanied by some near or below average temperatures. Except for the 2nd at 1 ºC below average and the 4th at near average the first 18 days of the month was above average of 2 ºC to 4 ºC on most days, with some days easing to 1 ºC above average. Some days during the rest of the month were above average that were 2 ºC to 4 ºC above average, along with a few near average or cool days falling as low as 4 ºC below average.
Maximum temperatures saw several cool days mostly between the 21st and 25th during rainfall, and some days were close to average or above average throughout the month. The 3rd was 4 ºC above average, 4 ºC below average on the 9th and was otherwise relatively close to average at the start of the month. The 10th to 12th was a warm period of up to 3 ºC above average, followed by below average or near average temperatures until the 17th. A warm period of up to 4 ºC above average on the 18th to 20th. The 21st to 25th was below average of up to 5 ºC below average during rainfall before close to average or above average daytime temperatures during the rest of the month.
August maximum temperatures saw many days of above average temperatures with very few cool days on two days at the middle of the month and 1 day later in the month. After a few days of close to average temperatures a warm period of 2 ºC to 4 ºC followed on the 4th to 6th. After the 8th was 2 ºC above average, cooler days followed 3 ºC to 4 ºC below average on the following two days. Warmer days followed of 2 ºC to 5 ºC on the 13th to 15th. The 18th to 21st was warm being 2 ºC to 5 ºC above average, with the temperatures close to average following this warmth except for 2 ºC below average on the 23rd, 4 ºC above average on the 28th and 5 ºC above average on the 31st.
Seasonal Average Minimum Grass Temperature: 8.6 ºC (0.9 ºC higher than same season in 2019)
Lowest Seasonal Minimum Grass Temperature: 3.3 ºC on 25 August 2020 (0.7 ºC lower than same month in 2019). This coincided with the lowest minimum air temperature of 4.2 ºC for the month.
Highest Seasonal Minimum Grass Temperature: 16.9 ºC on 14 June 2020 (3.9 ºC lower than same month in 2019). This coincided with the highest minimum air temperature of 18.3 ºC for the month.
Highest Minimum Grass Temperature Depression: 4.9 ºC on 24 August 2020 with a minimum grass temperature of 6 ºC and an air temperature of 10.9 ºC.
Lowest Minimum Grass Temperature Depression: -2.8 ºC on 28 July 2020 with a minimum grass temperature of 10.1 ºC and an air temperature of 12.9 ºC.
Seasonal Mean Minimum Pressure: 1017.2 hPa (1.6 hPa lower than same season in 2019).
Seasonal Mean Maximum Pressure: 1021.7 hPa (1.7 hPa lower than same season in 2019). This is the equal lowest on record for winter since 1021.7 hPa in 2012.
Seasonal Mean Pressure: 1019.4 hPa (1.6 hPa above average) and 1.7 hPa lower than same season in 2019.
Lowest Seasonal MSL Pressure: 1002 hPa on 19 August 2020 at 2:56 PM. The same month in 2019 saw 1005.6 hPa and the same season in 2019 saw 1005.6 hPa. This is the lowest monthly and daily minimum air pressure for August on record exceeding the previous record low of 1005.3 hPa in 2016 on 24 August at 12:25 PM.
Seasonal Highest MSL Pressure: 1031.3 hPa on 18 June 2020 at 9:19 AM. The same month in 2019 saw 1032.0 hPa and the same season in 2019 was 1032 hPa.
Seasonal Mean Minimum Relative Humidity: 45.3 % (9.8 % higher than same season in 2019 and 3.9 % below average).
Seasonal Mean Maximum Relative Humidity: 90.5% (7.2% higher than same season in 2019 and 2% above average). This is the highest on record for winter since 91.4 % in 2015.
Seasonal Mean Relative Humidity: 67.9 % (8.5 % higher than same season in 2019 and 4 % below average).
Lowest Seasonal Humidity: 18 % on 28 August 2020 at 2:29 PM (10% higher than this month in 2019 and 15% higher than same season in 2019)
Seasonal Highest Humidity: 99 % on 17 June 2020 at 7:58 AM (1% higher than this month in 2019 and 5% higher than same season in 2019).
Seasonal mean minimum dew point: 6.9 ºC (0.2 ºC below average).
Seasonal mean maximum dew point: 17.9 ºC (0.6 ºC above average).
Seasonal mean dew point: 9.9 ºC (0.2 ºC above average).
Lowest dew point: -3.3 ºC on 23 August 2020 at 4:03 PM.
Highest dew point: 21 ºC on 14 June 2020 at 12:45 PM. This is the second highest monthly and daily maximum dew point on record for June, and the highest since the current record high of 21.5 ºC in 2009 on 19 June. For winter this is the equal second highest seasonal and daily maximum dew point on record, and the highest since the current record high of 21.5 ºC in 2009 on the 19 June.
Maximum Wind Gust: 48 km/hr on 22 August 2020 at 12:31 PM. The maximum wind gust this month in 2019 and this season in 2019 was 56 km/hr. For winter this is the lowest maximum seasonal wind gust, exceeding the previous record low of 49.4 km/hr in 2013 on 8 June at 2:18 PM.
Maximum Wind Speed: 26 km/hr on 16 August 2020 at 2:20 PM (Moderate Force Wind). For winter this is the equal lowest seasonal maximum wind speed on record, equalling 26 km/hr in 2019 on 4 June at 2:10 PM.
Seasonal Wind Run: 8016.7 km (134.1 km less than same season in 2019). This is the second highest on record and the highest since the current record high of 8150.8 km in 2019. This is 951.3 km above average and 13.5 % above average.
Seasonal Mean Wind Speed: 3.7 km/hr (0.3 km/hr lower than this season in 2019, 0.5 km/hr below average and 15.9 % above average) and the second highest on record for winter, with the current record being 4 km/hr in 2019.
Seasonal Mean Daily Wind Gust: 25 km/hr (0.4 km higher than this season in 2019), 4 km/hr above average and 19% above average.
Seasonal Mean Daily Maximum Wind Speed: 12.5 km/hr, equal to this season in 2019, 3.9 km/hr above average and 31.2 % above average. This is the second lowest daily mean maximum wind speed on record for winter.
Dominant Direction: SW (SW this season in 2019).
Rainfall total: 110.7 mm, 21.3 mm below average (83.3 % of long term average), 2 mm above the long term median and 101.8 % of the site median. This ranks as decile 6/ 54th percentile and as average. This is higher than this season in 2019 which was 65.3 mm. Automatic rain gauge was 87.8 mm (-20.6 % of manual gauge).
Highest daily rainfall total: 23 mm on 26 July 2020.
Number of rain days (0.1 mm or greater): 24 days, 1 greater than same season in 2019 and 6 days above average.
Highest rainfall rate: 155.6 mm/hr on the 14 June 2020 at 12:59 PM.
Highest hourly rainfall: 11.6 mm on the 14 June 2020 at 1:19 PM. For winter this is the fourth highest seasonal maximum hourly rainfall on record since 13 mm in 2013 on 14 June at 2:15 PM.
There was 0 thunderstorms, with 0 days with thunder, with no nearby thunderstorms.
During June there were several days during the middle of the month that saw mostly light showers. A shower on the 14th brought brief heavy falls (5.8 mm in 3 minutes). On the 20th to 22nd were further light showers and drizzle returning on the 28th and 29th.
On the 9th, 10th and 12th were light showers and drizzle with some light rain. Rainfall returned later in the month with further light rain at times and showers between the 24th and 26th. On the 26th the passage of gust front brought showers but with no measurable rainfall.
Some light rain with brief heavy falls in the afternoon on the 7th (12.2 mm of rainfall). The 15th saw some light rain at times early in the day. Light showers on the 15th accompanied with gusty winds brought 1.4 mm.
There were 8 days of morning dew.
Morning mist on 7th and 15th.
The weather was dominated by high pressure ridges extending little wind or onshore winds with warm days and warm nights throughout the month. A warm and moist air mass on the 14th brought a record warm morning and also produced showers. A cool and dry air mass was in place between the 22nd and 26th that was followed by the passage of a trough and cold front and this brought sunny dry weather with cool nights, which was accompanied with some overnight wind that slowed the temperature falling overnight.
Long period rainfall totals over the shorter timespans improved slightly with the near median rainfall in June but the longer timespans have remained the same or deteriorated further given past months has seen below average rainfall totals. 6 monthly rainfall remained above average but was below average for 9 monthly to 48 monthly, with the greatest being 18 monthly rainfall at 285.5 mm below average.
For June there were 5 existing records exceeded or equalled, along with 5 records that was highest/lowest in at least 5 years.
There were 7 days of morning dew.
Several days of smoke haze in the first week of the month.
Gusty NNW to WSW winds with the apparent temperature several degrees below the air temperature on the 14th.
There was an absence of clear calm nights which prevented the temperature falling throughout the night to become cold before sunrise. On many nights, the wind persisted which resulted in a slow fall in the temperature or the minimum temperature occurring during the middle of the night before warming before sunrise.
During much of the month the weather was influenced by high pressure extending a cool and dry air mass with settled weather. More cloud and rainfall than typical and resulting warm nights were caused by several frontal system that moved thorough. A high pressure ridge and onshore flow from the 9th gave way to the passage of the cold front followed by a upper level trough which cleared on the 12th. A low pressure system deepened off the southern New South Wales and extend dry flow of west to south-westerly winds on the 13th and 14th. A decaying upper trough followed by the passage of a coastal trough along the southern Queensland coast between the 23rd and 26th brought further instability after which the system moved away into the Tasman Sea, deepened and extended further air flow of dry and stable air.
Long period rainfall totals remained below average but improved a little for most periods. The shorter time spans remained above average. 6 monthly rainfall remained above average but was below average for 9 monthly to 48 monthly, with the greatest being 18 monthly rainfall at 236.9 mm below average.
For July there were 2 existing records exceeded or equalled, along with 9 records that was highest/lowest in at least 5 years.
There were 5 days of morning dew.
Smoke haze on the 5th to 7th, 14th and 31st.
Heavy fog in early morning of the 14th with visibility down to 150 metres.
There were many warm nights during the month with the temperature reaching the minimum temperature in the evening or well before sunrise due to persistent wind or cloud cover before the temperature rose or became stable during the rest of the overnight hours.
WSW to NW winds were moderate at times in the afternoon of the 9th, 10th and 22nd.
On the 15th with some rainfall cloud increased before dry and gusty W to NW winds in the evening.
Low humidity in the evening of the 19th, 20th, in the evening of the 23rd and on the 24th.
Much of the month saw high pressure extending cool and stable conditions. Several troughs or fronts passed through which brought some rainfall. Later in the month the troughs brought no rainfall with warm and dry conditions with their passage and further dry air in westerly winds in the wake of the troughs.
Long period rainfall totals remained well below average while deteriorating further. The shorter time spans remained above average. 6 monthly rainfall slipped significantly to 161.7 mm below average being more than 6 months since significant rainfall at the start of the year. 9 monthly rainfall was 79.4 mm above average while 12 to 48-month rainfall was between 72.4 mm below average for 12 month rainfall and 245.3 mm below average for 24 month rainfall.
For August there were 0 existing records exceeded or equalled, along with 8 records that was highest/lowest in at least 5 years.
For more detailed analysis refer to the “Seasonal Meteorological Report for winter 2020”
Summary of Averages and Extremes for winter 2020 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 |
June |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
11.0 |
22.6 |
16.8 |
11.6 |
9.4 |
1.6 |
51.9 |
93.7 |
72.8 |
1019.8 |
1024.0 |
1021.9 |
11.6 |
22.0 |
10.5 |
1.5 |
Min |
5.9 |
17.3 |
13.9 |
5.1 |
5.3 |
0.6 |
26 |
72 |
55.5 |
1011.8 |
1015.8 |
1013.8 |
-0.2 |
14.0 |
6.0 |
|
Max |
18.3 |
25.8 |
21.0 |
16.4 |
16.9 |
3.6 |
83 |
99 |
90.5 |
1028.7 |
1031.3 |
1030.0 |
21.0 |
41.0 |
20.0 |
16.4 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
45.5 |
July |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
10.0 |
22.2 |
16.1 |
12.2 |
8.4 |
1.6 |
46.1 |
91.1 |
68.6 |
1017.4 |
1021.9 |
1019.6 |
9.7 |
24.4 |
12.2 |
1.6 |
Min |
5.0 |
16.7 |
13.5 |
4.5 |
3.9 |
-2.8 |
21 |
75 |
50.5 |
1007.9 |
1012.4 |
1010.4 |
-2.6 |
17.0 |
6.0 |
|
Max |
15.6 |
26.1 |
19.8 |
19.4 |
15.0 |
4.0 |
87 |
98 |
92.5 |
1026.0 |
1029.8 |
1027.9 |
17.9 |
46.0 |
23.0 |
23.0 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
50.4 |
August |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
10.1 |
24.0 |
17.0 |
13.9 |
8.0 |
2.1 |
37.8 |
86.8 |
62.3 |
1014.3 |
1019.3 |
1016.8 |
8.5 |
28.7 |
14.9 |
0.9 |
Min |
4.2 |
18.6 |
13.9 |
8.7 |
3.3 |
0.6 |
18 |
53 |
38.5 |
1002.0 |
1006.4 |
1004.2 |
-3.3 |
15.0 |
9.0 |
|
Max |
16.3 |
27.9 |
20.7 |
20.8 |
15.7 |
4.9 |
64 |
98 |
81.0 |
1026.5 |
1029.9 |
1028.2 |
18.7 |
48.0 |
26.0 |
12.2 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
14.8 |
Season |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
10.3 |
22.9 |
16.6 |
12.6 |
8.6 |
1.8 |
45.3 |
90.5 |
67.9 |
1017.2 |
1021.7 |
1019.4 |
9.9 |
25.0 |
12.5 |
1.4 |
Min |
4.2 |
16.7 |
13.5 |
4.5 |
3.3 |
-2.8 |
18 |
53 |
38.5 |
1002.0 |
1006.4 |
1004.2 |
-3.3 |
14.0 |
6.0 |
|
Max |
18.3 |
27.9 |
21.0 |
20.8 |
16.9 |
4.9 |
87 |
99 |
92.5 |
1028.7 |
1031.3 |
1030.0 |
21.0 |
48.0 |
26.0 |
23.0 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
110.7 |
Summary for winter 2020 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 long-term average (%) |
June |
|
|
|
|
|
|
|
|
Average |
+0.9 |
+0.0 |
+4.7 |
0.6 |
+1.4 |
+2.2 |
-16.4 |
73.5 |
Min |
+0.6 |
-4.0 |
|
0.1 |
|
|
|
|
Max |
+1.2 |
+4.1 |
|
1.2 |
|
|
+22.7 |
|
July |
|
|
|
|
|
|
|
|
Average |
+0.7 |
-0.4 |
+1.7 |
+0.3 |
+4.4 |
+4.1 |
16.9 |
150.3 |
Min |
+1.1 |
-3.7 |
|
+0.2 |
|
|
|
|
Max |
+0.4 |
+3.0 |
|
+0.4 |
|
|
+34.1 |
|
August |
|
|
|
|
|
|
|
|
Average |
+1.2 |
-2.4 |
-1.6 |
-0.3 |
+6.2 |
+5.4 |
-21.7 |
40.6 |
Min |
+1.2 |
-3.9 |
|
-0.8 |
|
|
|
|
Max |
+1.3 |
-1.0 |
|
+0.2 |
|
|
-2.2 |
|
Season |
|
|
|
|
|
|
|
|
Average |
+0.9 |
-0.9 |
+1.6 |
+0.2 |
+4.0 |
+3.9 |
-21.3 |
83.3 |
Min |
+0.9 |
-3.9 |
- |
-0.2 |
- |
- |
- |
- |
Max |
+0.9 |
+2.0 |
- |
+0.6 |
- |
- |
- |
- |
Monthly averages and extremes for winter 2020 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 |
|
|
|
Jun-20 |
11.0 |
22.6 |
5.9 |
25.8 |
16.8 |
+0.6 |
+1.2 |
+0.9 |
45.5 |
- 16.4 |
13 |
Jul-20 |
10.0 |
22.2 |
5.0 |
26.1 |
16.1 |
+1.1 |
+0.4 |
+1.2 |
50.4 |
16.9 |
8 |
Aug-20 |
10.1 |
24.0 |
4.2 |
27.9 |
17.0 |
+1.2 |
+1.3 |
+1.2 |
14.8 |
-21.7 |
3 |
Season |
10.3 |
22.9 |
9.1 |
35.2 |
16.6 |
+0.9 |
+0.9 |
+1.1 |
110.7 |
-21.3 |
24 |
Data copyright Ferny Grove Weather 2020, Produced 18/3/2021. 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.