In April at Ferny Grove overnight temperatures were close to average. Daytime temperatures were well above average and the highest on record, with many warm days during the month. Very little rainfall was observed at Ferny Grove and was well below average that was 14 % of the long term average. Mean relative humidity was below average, mean dew point was near average and mean air pressure was above average. There were 1 thunderstorm (1 thunder day).
Mean minimum temperature: 16 ºC, equal to the long term average and 0.4 ºC lower than same month in 2019.
Mean maximum temperature: 29.1 ºC, 2.7 ºC above average and 2.4 ºC higher than same month in 2019. This is the highest on record for April on record exceeding the previous record high of 28.9 ºC in 2016.
Mean temperature: 22.6 ºC, 1.4 ºC above average, 1 ºC higher than same month in 2019. This is the second highest on record for April and the highest since the current record high of 22.7 ºC in 2016.
Lowest temperature: 11.9 ºC on 21 April 2020 at 6:03 AM. Same month in 2019 was 14.1 ºC.
Highest temperature: 34.2 ºC on 17 April 2020 at 3:19 PM. The same month in 2019 was 30.5 ºC. This is the highest maximum daily temperature for April on record, exceeding the previous record high of 33.1 ºC in 2018 on 15 April at 2:09 PM
Lowest maximum temperature: 24.7 ºC on 19 April 2020 at 3:12 PM. This is the second highest monthly lowest maximum daily temperature for April on record and the highest since current record high of 24.8 ºC in 2016. This month in 2019 was 23.3 ºC.
Highest minimum temperature: 20.6 ºC on 4 April 2020 at 6:39 AM. This month in 2019 was 19 ºC.
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 April saw predominately above average temperatures with very few days of below average or near average maximum temperatures. After the first 7 days saw temperatures that were 3 ºC to 5 ºC above average, temperatures were within 1 ºC of the average were experienced between the 8th and 10th. Between the 11th and 18th the temperature rose again with highest being 8 ºC above average on the 17th though the 13th was close to average. The 19th was 2 ºC below average before temperatures of 2 ºC to 6 ºC above average most of the remainder of the month.
Monthly Mean Minimum Grass Temperature: 14.6 ºC (0.7 ºC lower than same month in 2019).
Lowest Minimum Grass Temperature: 10.6 ºC on 21 April 2020 (2.2 ºC lower than same month in 2019). This coincided with the lowest minimum air temperature of 11.9 ºC for the month.
Highest Minimum Grass Temperature: 19 ºC on 4 April 2020 (1.2 ºC higher than same month in 2019). This coincided with the highest minimum air temperature of 20.6 ºC for the month.
Highest Minimum Grass Temperature Depression: 2.7 ºC on 18 April 2020 with a minimum grass temperature of 17 ºC and an air temperature of 19.7 ºC.
Lowest Minimum Grass Temperature Depression: 0.6 ºC on 20 April 2020 with a minimum grass temperature of 11.7 ºC and an air temperature of 12.3 ºC.
Mean minimum MSL pressure: 1014.2 hPa (2 hPa higher than same month in 2019). This is the fourth lowest on record for April and the lowest since 1013.9 hPa in 2014.
Mean maximum MSL pressure: 1019 hPa (1.3 hPa higher than same month in 2019).
Mean MSL pressure: 1016.6 hPa (1.2 hPa above average, 4.2 hPa lower than same month in 2019). This is the lowest for April since 1016 hPa in 2014.
Lowest MSL pressure: 1006.4 hPa on 4 April 2020 at 2:57 PM. The same month in 2019 saw 1014.4 hPa. This is the lowest monthly minimum air pressure for April since 1006.2 hPa in 2015 on 5 April at 2:49 PM.
Highest MSL pressure: 1024.8 hPa on 14 April 2020 at 8:47 AM. The same month in 2019 saw 1025.5 hPa.
Mean minimum relative humidity: 43.2 % (11.1 % lower than same month in 2019 and 11.4 % below average). This is the lowest on record for April exceeding the previous record low of 51.5% in 2017.
Mean maximum relative humidity: 94.9 % (1.4 % higher than same month in 2019 and 2.9 % above average). This is second highest on record for April and the highest since the current record high of 95.6% in 2018.
Mean relative humidity: 69 % (4.9 % lower than same month in 2019 and 4.3 % below average). This is the lowest on record for April exceeding the previous record low of 70.1 % in 2017.
Lowest relative humidity: 18 % on 5 April 2020 at 3:02 PM (13% lower than this month in 2019). This is the lowest monthly minimum humidity for April on record, exceeding the previous record low of 31% in 2019 on 5 April at 2:18 PM.
Highest relative humidity: 98 % on 30 April 2020 at 7:09 AM (equalled this month in 2019). This is the second highest monthly April maximum humidity on record and equalled 98% in 2019 on 27 April 2019 at 7:17 AM.
Monthly mean minimum dew point: 12.7 ºC (1.4 ºC below average). This is the equal second lowest monthly mean minimum dew point for April on record and the lowest since 12.7 ºC in 2017.
Monthly mean maximum dew point: 19.2 ºC (0.6 ºC below average).
Monthly mean dew point: 16 ºC (0.4 ºC below average).
Lowest dew point: 2.9 ºC on 12 April 2020 at 12:15 PM. This is the lowest monthly minimum dew point for April on record, exceeding the previous record low of 3.4 ºC in 2017 on 10 April at 9:05 PM.
Highest dew point: 22.6 ºC on 4 April 2020 at 5:24 PM.
Highest wind gust: 37 km/hr on 30 April 2020 at 8:54 PM. The maximum wind gust this month in 2019 was 37 km/hr.
Highest wind speed: 21 km/hr on 30 April 2020 at 9:07 PM (Moderate Force Wind). The highest wind speed this month in 2029 was 28 km/hr.
Total Wind Run: 2022.5 km (644.4 km higher than same month in 2019), 32.3 km above average and 1.6 % above average. This is the second highest on record for April total wind run and the highest since the current record high of 2666.9 km in 2019.
Mean wind speed: 2.8 km/hr (0.9 km lower than this month in 2019), and equal to the long-term average. This is the second highest on record for April and the highest since the current record high of 3.7 km/hr in 2019.
Daily Mean Maximum Wind Gust: 22.3 km/hr (2.3 km/hr lower than this month in 2019), 2.2 km/hr above average and 10.9% above average. This is the lowest daily mean maximum wind gust on record for April since the current record low of 17 km/hr in 2013.
Daily Mean Maximum Wind Speed: 11.3 km/hr, 0.4 km/hr lower than this month in 2019), 3.5 km/hr above average and 45.2 % above average. This is the lowest daily mean maximum wind speed on record for April since the current record low of 8.9 km/hr in 2012.
Dominant Direction: SE (S this month last year).
Rainfall total: 13.5 mm, 80.3 mm below average (14.4 % of long term average), 28.7 mm below the long term median and 32% of the site median. This is lower than this month last year which was 64.9 mm. Automatic rain gauge was 11 mm (-18.5 % of manual gauge).
Highest daily rainfall total: 4.3 mm on 20 April 2020.
Number of rain days: 9 days, 7 less than this month in 2019 and 0.5 days above average. This is the lowest for March since 9 days in 2015.
Highest rainfall rate: 42.8 mm/hr on the 28 April 2020 at 11:01 AM.
Highest hourly rainfall total: 3.8 mm on the 19 April 2020 at 11:25 AM. This is the second lowest hourly rain for April
Most rainfall during March 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.
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.
For more detailed analysis refer to the “Monthly Meteorological Report for April 2020”
Summary of Averages and Extremes for April 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 |
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 |
53 |
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 |
83 |
1021.4 |
1024.8 |
1023.1 |
22.6 |
37.0 |
21.0 |
4.3 |
Total |
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
13.5 |
Summary for April 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 |
-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 |
|
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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 |
+1.5 |
+1.4 |
183.3 |
+38.3 |
15 |
Feb-20 |
21.2 |
30.4 |
19.6 |
37.6 |
25.8 |
+0.9 |
+0.4 |
+0.7 |
389.2 |
+227.4 |
20 |
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 |
YTD |
19.5 |
30.2 |
11.9 |
37.6 |
24.8 |
+0.4 |
+1.3 |
+0.8 |
728.4 |
+203.6 |
59 |
Data Copyright Ferny Grove Weather 2020, Produced 18/4/20. 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.
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”.