In autumn at Ferny Grove overnight temperatures were close to average, whilst daytime temperatures were above average. Rainfall was below average at Ferny Grove (37 % of the long-term median) and was the lowest autumn rainfall total since 2016. Mean relative humidity was below average, mean air pressure was above average, mean dew point was below average and wind speed above average. There were 2 thunderstorms.
Seasonal mean minimum temperature: 15.8 ºC, 0.1 ºC below average and 0.8 ºC lower than the same season in 2019.
Seasonal mean maximum temperature: 27.5 ºC, 1.1 ºC above average and 0.1 ºC lower than the same season in 2019.
Seasonal mean temperature: 21.6 ºC, 0.5 ºC above average and 0.5 ºC lower than same season in 2019.
Lowest temperature: 9.1 ºC on 4 May 2020 at 3:28 AM. Same month and season in 2019 was 4.4 ºC. For autumn this is the highest seasonal minimum temperature on record, exceeding the previous record high of 9 ºC in 2017 on 31 May at 7:09 AM.
Highest temperature: 35.2 ºC on 2 March 2020 at 2:33 PM. The same month in 2019 was 36.7 ºC and the same season in 2019 was 41.1 ºC.
Lowest maximum temperature: 15.6 ºC on 23 May 2020 at 8:55 AM. This month in 2019 was 28.0 ºC and this season in 2019 was 20.6 ºC. For autumn and May this is the lowest seasonal and daily lowest maximum temperature on record, exceeding the previous record low of 17.7 ºC in 2013 on 16 May at 12:20 AM.
Highest minimum temperature: 24.4 ºC on 6 March 2020 at 3:50 AM. This month in 2019 was 22.9 ºC and this season in 2019 was 22.9 ºC. For autumn and May this is the highest seasonal and daily minimum temperature, exceeding the previous record high of 24.2 ºC in 2015 on 26 March at 6:20 AM.
In March minimum temperatures saw above average minimum temperatures in the first week before below average temperatures during two periods during the rest of the month interspersed by a short period of warmer temperatures. The 4th to 8th was 2 ºC to 3 ºC above average during the warm spell at the start of the month. The cool spells saw temperatures that were between 1 ºC and 4 ºC below average.
April minimum temperatures saw a mixture of above average and below average temperatures. Most warm nights occurred during the first 11 days of the month, with several nights that were between 3 ºC and 5 ºC above average. A cooler spell followed between the 13th and 17th of 1 ºC to 3 ºC below average temperatures. The 18th was 4 ºC above average before reverting back to near average or below average during most nights for the remainder of the month. It was 4 ºC below average on the 21st and otherwise relatively close to average during this time. The 28th was 2 ºC above average before returning to near average at the end of the month.
Observed minimum temperatures in May were both below and above average throughout the month with many nights close to average. Most of the first 11 nights were slightly cool or warm with some warm nights, followed by a mixture of warm and cool nights for the following nights. The 16th to 21st was a warm period with temperatures of 1 ºC to 3 ºC above average followed by a cool period between the 22nd and 27th of 1 ºC to 3 ºC below average. The remainder of the moth was slightly warm or cool.
Maximum temperatures in March saw below average temperatures during some days in the middle of the month and later in the month. There were above average maximum temperatures in the first week and some short spells in the second half of the month. The first week saw a 7 day period of above average temperatures that were between 2 ºC and 7 ºC above average. A 10 day period of cooler temperatures followed from the 10th with some days of relatively close to the long term average and as much as 4 ºC below average. A 3 day warm spell followed from the 20th of 2 ºC to 5 ºC above average. The remainder of the month saw close to average or below average temperatures.
April minimum temperatures saw a mixture of above average and below average temperatures. Most warm nights occurred during the first 11 days of the month, with several nights that were between 3 ºC and 5 ºC above average. A cooler spell followed between the 13th and 17th of 1 ºC to 3 ºC below average temperatures. The 18th was 4 ºC above average before reverting back to near average or below average during most nights for the remainder of the month. It was 4 ºC below average on the 21st and otherwise relatively close to average during this time. The 28th was 2 ºC above average before returning to near average at the end of the month.
Maximum temperatures in May were generally above average, with some days close to average. There were however some cool to cold days during the month, mostly between the 20th and 24th. The first 11 days generally saw slightly warm days after the first two days were close to average, peaking at 4 ºC above average on the 9th. On the 11th to 13th temperatures were near average, slightly cool, or slightly warm, warming to 3 ºC above average on the 14th and close to average or slightly warm until the 19th. Cool to cold days followed, especially on the 22nd being 6 ºC below average and the 23rd being 9 ºC below average. The 25th to 30th was slightly warm and the 31st was slightly cool.
Seasonal Average Minimum Grass Temperature: 14.3 ºC (0.9 ºC lower than same season in 2019)
Lowest Seasonal Minimum Grass Temperature: 6.8 ºC on 24 May 2020 (5 ºC higher than same month in 2019). This coincided with the lowest minimum air temperature of 11.9 ºC for the month.
Highest Seasonal Minimum Grass Temperature: 22.8 ºC on 6 March 2020 (1 ºC higher 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: 3.1 ºC on 24 May 2020 with a minimum grass temperature of 6.8 ºC and an air temperature of 9.9 ºC.
Lowest Minimum Grass Temperature Depression: 0.2 ºC on 27 March 2020 with a minimum grass temperature of 17.5 ºC and an air temperature of 17.7 ºC.
Seasonal Mean Minimum Pressure: 1015.4 hPa (1.3 hPa lower than same season in 2019).
Seasonal Mean Maximum Pressure: 1019.8 hPa (1.2 hPa lower than same season in 2019).
Seasonal Mean Pressure: 1017.6 hPa (1.8 hPa above average) and 1.5 hPa lower than same season in 2019.
Lowest Seasonal MSL Pressure: 1006.4 hPa on 4 April 2020 at 2:57 PM. The same month in 2019 saw 1014.4 hPa and the same season in 2019 saw 1004 hPa.
Seasonal Highest MSL Pressure: 1028.1 hPa on 18 May 2020 at 9:39 AM. The same month in 2019 saw 1028.6 hPa and the same season in 2019 was 1028.6 hPa.
Seasonal Mean Minimum Relative Humidity: 47.1 % (0.9 % higher than same season in 2019 and 7.7 % below average). This is the second lowest on record for autumn and the highest since 55.8 % in 2018.
Seasonal Mean Maximum Relative Humidity: 91.0% (2.4% higher than same season in 2019 and 0.3% below average).
Seasonal Mean Relative Humidity: 69 % (1.6 % higher than same season in 2019 and 4 % below average). This is the second lowest on record for autumn and the highest since 75.1 % in 2018.
Lowest Seasonal Humidity: 18 % on 5 April 2020 at 3:02 PM (11% lower than this month in 2019 and 11% higher than same season in 2019). For autumn this is the second lowest seasonal minimum relative humidity, the highest since 32% in 2018 on 11 March at 6:19 PM.
Seasonal Highest Humidity: 99 % on 7 March 2020 at 6:52 AM (1 % lower than this month in 2019 and 2% higher than same season in 2019). For autumn this is the second highest seasonal maximum relative humidity on record and the highest since 100% in 2017 on 30 March 2017 at 1:00 PM.
Seasonal mean minimum dew point: 12.4 ºC (1.6 ºC below average). This is the second lowest seasonal mean minimum dew point on record for autumn, and the highest since 14.2 ºC in 2019.
Seasonal mean maximum dew point: 17.9 ºC (0.4 ºC below average).
Seasonal mean dew point: 15.1 ºC (1.0 ºC below average). This is the equal lowest seasonal mean dew point on record for autumn, equalling the current record low of 15.1 ºC in 2019.
Lowest dew point: 1.9 ºC on 3 May 2020 at 3:58 PM.
Highest dew point: 24.6 ºC on 7 March 2020 at 8:38 AM. For autumn this is the equal second highest seasonal and daily maximum dew point on record, and the highest since the current record high of 25.7 ºC in 2014 on the 29 March at 1:11 PM.
Wind
Maximum Wind Gust: 42 km/hr on 13 March 2020 at 12:50 PM. maximum wind gust this month in 2019 was 46 km/hr and this season in 2019 was 52 km/hr. For autumn this is the second lowest maximum seasonal wind gust and the lowest since the current record low of 39.5 km/hr in 2010 on 26 May at 3:06 PM.
Maximum Wind Speed: 28 km/hr on 3 May 2020 at 10:50 AM (Moderate Force Wind). This season in 2018 was 45.7 km/hr.
Seasonal Wind Run: 8067.2 km (138 km less than same season in 2019). This is the second highest on record and the highest since the current record high of 8205.2 km in 2019. This is 211.1 km above average and 2.7 % above average.
Seasonal Mean Wind Speed: 3.7 km/hr (0.1 km/hr lower than this season in 2019, 0.9 km/hr above average and 32.1 % above average) and the second highest on record for autumn, with the current record being 3.8 km/hr in 2019.
Seasonal Mean Daily Wind Gust: 24 km/hr (0.9 km lower than this season in 2019), 3.8 km/hr above average and 18.8% above average. This is the lowest daily mean maximum wind gust for autumn on record since 22.8 km/hr in 2014.
Seasonal Mean Daily Maximum Wind Speed: 12.1 km/hr, 0.1 km/hr lower than this season in 2019, 4.1 km/hr above average and 51.2 % above average. This is the lowest daily mean maximum wind speed on record for autumn since 9.1 km/hr in 2012.
Dominant Direction: S (S this season in 2018-19).
Rainfall total: 168 mm, 153mm below average (52.3 % of long term average), 99.3 mm below the long term median and 37.1 % of the site median. This ranks as decile 3/ 31st percentile and as low. This is lower than this season in 2019 which was 343.2 mm. Automatic rain gauge was 137.2 mm (-18.3 % of manual gauge).
Highest daily rainfall total: 43.8 mm on 7 March 2020.
Number of rain days (0.1 mm or greater): 32 days, 15 less than same season in 2019 and 1.8 days above average. This is the lowest on record for autumn since 27 days in 2015.
Highest rainfall rate: 192 mm/hr on the 6 March 2020 at 5:27 PM. For autumn this is the second highest seasonal and daily rain rate and the highest since the current record high of 217.4 mm/hr in 2019 on 15 March at 4:20 PM.
Highest hourly rainfall: 40.6 mm on the 6 March 2020 at 5:47 PM. For autumn this is the highest seasonal and daily maximum hourly rainfall on record, exceeding the previous record high of 38.8 mm on 1 May 2015 at 5:15 PM.
There was 2 thunderstorms, with 2 days with thunder, with no nearby thunderstorms.
In March rainfall was close to average with a total of 142.4 mm and 114.7% of the long term average which ranked as average. At Ferny Grove in the first half of the March were showers and thunderstorms, with light rain and drizzle after the first week. A severe thunderstorm of the 6th brought extremely heavy rainfall of 40 mm in 30 minutes. Some light showers and drizzle in the last week of the month.
Rainfall in April was well below average with a total of 13.5 mm which was 14.4% of the long term average and ranked as very low. Most rainfall at Ferny Grove during April were light showers occurring mostly in the first half of the month. The highest daily rainfall total was produced by a late morning mild thunderstorm with mostly light rain and some brief moderate falls.
In May there was 12.1 mm of rainfall (well below average) which was 11.8% of the long term average and ranked as very low (lowest for May since 2004). In May at Ferny Grove most rainfall were light showers occurring mostly during the middle of the month. On the 21st was some light rain at times, which brought the highest daily total for the month.
There were 13 days of morning dew.
Warm and sunny at the start of the month before cloudy skies between the 6th and 13th with cool days and rainfall. Later in the month with some further showers and with some more cloudy and cool days.
A high pressure ridge and onshore winds along the southern Queensland was present during much of the month. The rainfall in the first half of the month was as a result of a persistent inland surface trough aided by moist onshore winds.
Short term rainfall totals of 6 to 12 monthly rainfall totals improved a little further and is above average after the third month of near or above average rainfall totals.
For March there were 10 existing records exceeded or equalled, along with 7 records that was highest/lowest in at least 5 years.
There were 25 days of morning dew.
The passage of surface troughs brought little rainfall with dry air following with fine weather and sunny skies. High pressure ridges brought some showers but otherwise fine weather generally.
Short term rainfall totals deteriorated over all timespans caused by the low rainfall, became below average and is well below average for the longer timespans of between 12 month and 48 months.
For April there were 6 existing records exceeded or equalled, along with 5 records that was highest/lowest in at least 5 years.
There were 5 days of morning dew.
The weather was dominated by onshore winds from high pressure system moderating the temperatures. A complex low pressure system extended a trough that brought some rain on the 21st followed by a cold and dry air mass that brought cool to cold temperatures on the 22nd to 24th. The maximum temperature on the 23rd was a new record low for May.
Long period rainfall totals deteriorated further over all timespans due to continued below average rainfall. 6 monthly rainfall remained above average but was below average for 9 monthly to 48 monthly with the lowest being 368 mm below average for 18 month rainfall.
For May there were 7 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 “Seasonal Meteorological Report for autumn 2020”
Summary of Averages and Extremes for autumn 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 |
March |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
18.7 |
29.1 |
23.9 |
10.4 |
17.5 |
1.3 |
51.5 |
91.4 |
71.4 |
1014.2 |
1018.4 |
1016.3 |
18.0 |
25.4 |
12.6 |
4.6 |
Min |
15.1 |
20.9 |
20.7 |
0.5 |
13.8 |
0.2 |
34 |
72 |
55.5 |
1007.3 |
1011.5 |
1009.4 |
11.4 |
17.0 |
7.0 |
|
Max |
24.4 |
35.2 |
28.4 |
17.2 |
22.8 |
2.7 |
79 |
99 |
88.0 |
1020.9 |
1024.5 |
1022.7 |
25.7 |
42.0 |
17.0 |
43.8 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
142.4 |
April |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
16.0 |
29.1 |
22.6 |
13.1 |
14.6 |
1.4 |
43.2 |
94.9 |
69.0 |
1014.2 |
1019.0 |
1016.6 |
16.0 |
22.3 |
11.3 |
0.5 |
Min |
11.9 |
24.7 |
19.8 |
7.4 |
10.6 |
0.6 |
18 |
86 |
52.5 |
1006.4 |
1010.9 |
1008.7 |
2.9 |
17.0 |
9.0 |
|
Max |
20.6 |
34.2 |
25.5 |
19.4 |
19.0 |
2.7 |
68 |
98 |
82.5 |
1021.4 |
1024.8 |
1023.1 |
22.6 |
37.0 |
21.0 |
4.3 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
13.5 |
May |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
12.7 |
24.2 |
18.4 |
11.5 |
10.9 |
1.8 |
46.5 |
86.7 |
66.6 |
1017.8 |
1022.1 |
1019.9 |
11.4 |
24.4 |
12.3 |
0.4 |
Min |
9.1 |
15.6 |
13.3 |
4.7 |
6.8 |
0.6 |
23 |
64 |
46.5 |
1008.0 |
1013.1 |
1010.8 |
1.9 |
10.0 |
3.0 |
|
Max |
15.6 |
28.1 |
20.5 |
17.1 |
14.1 |
3.1 |
79 |
98 |
88.0 |
1025.3 |
1028.1 |
1026.7 |
18.8 |
41.0 |
28.0 |
8.6 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
12.1 |
Season |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
15.8 |
27.5 |
21.6 |
11.7 |
14.3 |
1.5 |
47.1 |
91.0 |
69.0 |
1015.4 |
1019.8 |
1017.6 |
15.1 |
24.0 |
12.1 |
1.8 |
Min |
9.1 |
15.6 |
13.3 |
0.5 |
6.8 |
0.2 |
18 |
64 |
46.5 |
1006.4 |
1010.9 |
1008.7 |
1.9 |
10.0 |
3.0 |
|
Max |
24.4 |
35.2 |
28.4 |
19.4 |
22.8 |
3.1 |
79 |
99 |
88.0 |
1025.3 |
1028.1 |
1026.7 |
25.7 |
42.0 |
28.0 |
43.8 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
168.0 |
Summary for autumn 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 (%) |
March |
|
|
|
|
|
|
|
|
Average |
-0.0 |
-3.6 |
+3.3 |
-1.4 |
+3.6 |
+4.0 |
+18.2 |
114.7 |
Min |
-0.5 |
-5.7 |
|
-1.9 |
|
|
|
|
Max |
+0.4 |
-1.5 |
|
-0.9 |
|
|
+93.6 |
|
April |
|
|
|
|
|
|
|
|
Average |
+1.4 |
-4.3 |
+1.2 |
-0.4 |
+2.2 |
+3.5 |
-80.3 |
14.4 |
Min |
+0.0 |
-11.4 |
|
-1.4 |
|
|
|
|
Max |
+2.7 |
+2.9 |
|
+0.6 |
|
|
-16.7 |
|
May |
|
|
|
|
|
|
|
|
Average |
+0.1 |
-4.2 |
+3.1 |
-1.2 |
+5.6 |
+4.7 |
-90.9 |
11.8 |
Min |
+0.2 |
-6.0 |
|
-1.5 |
|
|
|
|
Max |
+0.0 |
-2.4 |
|
-1.0 |
|
|
-25.6 |
|
Season |
|
|
|
|
|
|
|
|
Average |
+0.5 |
-4.0 |
+2.5 |
-1.0 |
+3.8 |
+4.1 |
-153.0 |
52.3 |
Min |
-0.1 |
-7.7 |
- |
-1.6 |
- |
- |
- |
- |
Max |
+1.1 |
-0.3 |
- |
-0.4 |
- |
- |
- |
- |
Monthly averages and extremes for autumn 2020 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 |
|
|
|
Mar-20 |
18.7 |
29.1 |
15.1 |
35.2 |
23.9 |
-0.5 |
+0.4 |
-0.0 |
142.4 |
+ 18.2 |
15 |
Apr-20 |
16.0 |
29.1 |
11.9 |
34.2 |
22.6 |
+0.0 |
+2.7 |
+1.4 |
13.5 |
-80.3 |
9 |
May-20 |
12.7 |
24.2 |
9.1 |
28.1 |
18.4 |
+0.2 |
-0.0 |
+0.6 |
12.1 |
-90.9 |
8 |
Season |
15.8 |
27.5 |
9.1 |
35.2 |
21.6 |
-0.1 |
+1.1 |
+0.6 |
168.0 |
-153.0 |
32 |
Data copyright Ferny Grove Weather 2020, Produced 30/6/2019. 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.