At Ferny Grove during April overnight temperatures was near average but slightly warmer than normal. Daytime temperatures were near average. At Ferny Grove rainfall was near average but was above the long term median. Mean air pressure was well above average, mean humidity was below average, mean dew point was near average, wind speed was near average and there were zero thunderstorms (1 thunder days).
Monthly mean minimum temperature: 16.4 C, 0.4 ºC above average and 0.4 ºC higher than same month in 2018.
Monthly mean maximum temperature: 26.7 ºC, 0.1 ºC below average and 1.6 ºC lower than same month in 2018.
Monthly mean temperature: 21.6 ºC, 0.1 ºC above average and 0.5 ºC lower than same month in 2018.
Lowest temperature: 14.1 ºC at 5:50 AM on 13 April 2019. Same month in 2018 was 11.7 C. This is the second highest monthly minimum temperature for April on record, with the highest being 14.8 ºC in 2011 on the 10 April at 6:45 AM.
Highest temperature: 30.5 ºC at 2:07 PM on 8 April 2019. Same month in 2018 was 33.1 C.
Lowest maximum temperature: 23.3 ºC at 12:41 PM on 23 April 2019. This month in 2018 was 23.9 ºC.
Highest minimum temperature: 19 ºC on 20 April 2019 at 5:11 AM. This month in 2018 was 19.4 ºC.
At Ferny Grove during April minimum temperature were predominately above average, though there was a period of cool nights during the middle of the month and at the end of the month. The 1st was 2 ºC below average, close to average on the 2nd and followed by nights of 1 to 2 ºC above average between the 3rd and 7th. The 8th and 9th was on average, warming to 1 ºC above average on the 10th and 2 ºC above average on the 11th. A cool period followed between the 12th and 17th being 1 to 2 ºC below average. The 18th was on average before a warm period followed between the 19th and 26th. Except for the 24th which was on average minimum temperatures were 2 ºC above average and 3 ºC above average on the 20th and 21st, and easing to 1 ºC above average on the 26th. Below average temperatures followed at the end of the month at 1 ºC below average except for the 28th which was on average.
Maximum temperatures during the month at Ferny Grove were generally close to or below average with several above average days mostly early in the month. The first two days were close to average and cooled to 2 ºC below average on the 3rd. A warm period followed between the 4th and 10th with the 4th to 6th being 1 ºC above average, the 7th to 9th was 3 to 4 ºC above average and the 10th was 1 ºC above average. Then the 11th to 12th was 1 to 2 ºC below average, close to average on the 14th to 17th and 1 ºC below average on the 16th. The 18th was 1 ºC above average, the 19th was close to average and followed by another cool period from the 20th to 25th. The 20th was 3 ºC below average, the 21st and 22nd was 1 ºC below average, the 23rd was 4 ºC below average and the 24th was 1 ºC below average. The 25th was close to average before warming to 1 ºC above average on the 26th and 28th and 2 ºC above average on the 27th. The 29th and 30th was 3 ºC below average.
Monthly mean minimum grass temperature: 15.3 ºC (1.1 ºC higher than same month in 2018)
Lowest minimum grass temperature: .8 ºC on 16 April 2019 (2.1 ºC lower than same month in 2018).
Highest minimum grass temperature: 17.8 ºC on 20 April 2019 (0.5 ºC lower than same month in 2018). This coincided with the highest minimum temperature of 19 ºC for the month.
Highest Minimum Grass Temperature Depression: 2.0 ºC on 18 April 2019 with a minimum grass temperature of 13.8 ºC and an air temperature of 15.8 ºC.
Lowest Minimum Grass Temperature Depression: 0.4 ºC on 8 April 2019 with a minimum grass temperature of 15.8 ºC and an air temperature of 16.2 ºC.
Monthly mean minimum MSL pressure: 1018.9 hPa (4.2 hPa higher than same month in 2018). This is the highest on record for April exceeding the previous record high of 1017.7 hPa in 2016.
Monthly mean maximum MSL pressure: 1022.8 hPa (4.1 hPa higher than same month in 2018). This is the highest on record for April exceeding the previous record high of 1021.7 hPa in 2016.
Monthly mean MSL pressure: 1020.9 hPa (4.4 hPa above average, 4.1 hPa higher than same month in 2018). This is the highest on record for April exceeding the previous record high of 1019.7 hPa in 2016.
Lowest MSL pressure: 1013.7 hPa on 10 April 2019 at 3:24 AM. The same month in 2018 saw 1009.1 hPa. This is the second highest monthly minimum air pressure for April and the highest since the record high of 1014.4 hPa in 2016 on 11 April at 2:51 PM,
Highest MSL pressure: 1026.0 hPa on 4 April 2019 at 9:27 AM. The same month in 2018 saw 1023.8 hPa.
Monthly mean minimum relative humidity: 51.4 % (0.2 % higher than same month in 2018 and 7 % below average). This is the lowest on record for April exceeding the old record of 51.5 % in 2017.
Monthly mean maximum relative humidity: 89.1 % (1.3 % lower than same month in 2018 and 1.2 % below average).
Monthly mean relative humidity: 70.4 % (0.5 % lower than same month in 2018 and 4.1 % below average).
Lowest relative humidity: 28 % on 5 April 2019 at 2:18 PM (9 % lower than this month in 2018). This is the lowest monthly and daily minimum humidity for April on record exceeding the old record of 29 % on 10 April 2017 at 6:39 PM.
Highest relative humidity: 95 % on 27 April 2019 at 7:17 AM (3 % lower than this month in 2018). This is the lowest monthly April high humidity on record, exceeding the previous record of 97 % on 22 April 2017 at 7:30 AM.
Monthly mean minimum dew point: 13.3 ºC (0.9 ºC below average).
Monthly mean maximum dew point: 18.4 ºC (0.1 ºC above average).
Monthly mean dew point: 15.9 ºC (0.4 ºC below average).
Lowest dew point: 7 ºC on 5 April 2019 at 2:19 PM.
Highest dew point: 22.2 ºC on 20 April 2019 at 2:04 PM.
Highest wind gust: 37 km/hr on 20 April 2019 at 4:45 PM. This is the lowest April maximum wind gust since 19.4 km/hr in 2013 on the 3 April at 3:13 PM.
Highest wind speed: 15 km/hr on 19 April 2019 at 1:02 PM (Light Breeze Force Wind). This is the lowest monthly maximum wind speed for April, exceeding the previous record of 15.6 km/hr in 2012 on 12 April at 1:55 PM.
Total wind run: 2666.9 km (1446.1 km higher than same month in 2018), 1509 km above average and 43.4 % above average. This is the highest on record for April total wind run exceeding the old record of 1776.3 km in 2017.
Monthly mean wind speed: 3.7 km/hr (2 km higher than this month in 2018), 2.1 km/hr above average and 56.7 % above average (approx. 3 % above average accounting for measuring equipment changes). This is the highest on record for April exceeding the old record of 2.4 km/hr in 2017.
Daily mean maximum wind gust: 24.6 km/hr (8.4 km/hr lower than this month in 2018), 1.2 km/hr below average and 4.7 % below average.
Daily mean maximum wind speed: 11.7 km/hr, 4.4 km/hr lower than this month last year, 2.2 km/hr below average and 15.8 % below average. This is the lowest daily mean maximum wind speed on record for April since 8.9 km/hr in 2012.
Dominant direction: S (S this month last year).
Rainfall total: 64.9 mm, 30.8 mm below average (67.8 % of long term average), 20.7 mm above the long term median and 147 % of the long term median. This is higher than this month last year which was 40.2 mm. Automatic rain gauge was 71.2 mm (+9.7 % of manual gauge).
Highest daily rainfall total: 28.4 mm on 21 April 2019.
Number of rain days (0.1 mm or greater): 16 days, 1 less than this month last year and 6.4 days above average.
Highest rain fall rate: 188.8 mm/hr on the 20 April 2019 at 4:41 PM. This is the highest monthly and daily rainfall rate for April exceeding the previous record high of 74.6 mm/hr on 2 April 2015 at 5:25 PM.
Highest hourly rainfall total: 14.2 mm on the 20 April 2019 at 5:30 PM.
There were 0 thunderstorms, with 1 day with thunder, along with 1 nearby thunderstorm.
Rainfall at Ferny Grove consisted of showers throughout, with a large proportion of received rainfall in the middle of the month.
There was 5 days of morning dew.
High pressure ridge pattern brought onshore winds and showers during much of the month.
For April there were 10 existing records exceeded, along with 4 records that were highest/lowest in at least 5 years.
For more detailed analysis refer to the Monthly Meteorological Report for April 2019.
Summary of Averages and Extremes for April 2019 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 |
16.4 |
26.7 |
21.6 |
10.3 |
15.3 |
-1.1 |
51.4 |
90.5 |
70.9 |
1018.9 |
1022.8 |
1020.9 |
15.9 |
24.6 |
11.7 |
2.2 |
Min |
14.1 |
23.3 |
19.2 |
5.2 |
12.8 |
-2.0 |
28 |
74 |
57 |
1013.7 |
1019.1 |
1017.0 |
7.0 |
14.0 |
9.0 |
|
Max |
19.0 |
30.5 |
23.5 |
14.3 |
17.8 |
-0.4 |
85 |
95 |
90 |
1022.8 |
1026.0 |
1024.4 |
22.2 |
37.0 |
15.0 |
28.4 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
64.9 |
Summary for April 2019 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 |
+0.1 |
-4.1 |
+4.4 |
-0.4 |
-0.3 |
-4.4 |
-28.9 |
69.2 |
Min |
+0.4 |
-7.0 |
|
-0.9 |
|
|
|
|
Max |
-0.1 |
-1.2 |
|
+0.1 |
|
|
+36.3 |
|
Monthly averages and extremes for Year of 2019 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-19 |
20.8 |
32.0 |
18.5 |
34.3 |
26.4 |
-0.0 |
+1.2 |
+0.6 |
10.4 |
-134.6 |
9 |
Feb-19 |
20.9 |
31.2 |
16.8 |
36.7 |
26.0 |
+0.7 |
+1.1 |
+0.9 |
39.8 |
-122.0 |
13 |
Mar-19 |
20.4 |
31.4 |
14.1 |
41.1 |
25.9 |
+1.7 |
+3.0 |
+2.3 |
236.9 |
+112.7 |
18 |
Apr-19 |
16.4 |
26.7 |
14.1 |
30.5 |
21.6 |
+0.4 |
-0.1 |
+0.1 |
64.9 |
-30.8 |
16 |
YTD |
19.6 |
30.3 |
14.1 |
41.1 |
25.0 |
+0.7 |
+1.3 |
+1.0 |
352.0 |
-174.7 |
56 |
Data copyright Ferny Grove Weather 2019, Produced 24/7/2019. 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 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 usually 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 the automatic record became the official record instead, simplifying this process. Until replaced on 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.
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, while 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.