At Ferny Grove overnight temperatures were near average and daytime temperatures were above average. Very little rainfall was observed at Ferny Grove during the month and no rainfall observed during the first half of the month. Mean relative humidity was well below average and mean air pressure was above average. There were no thunderstorms (2 thunder days).
Mean minimum temperature: 12.1 ºC, 0.2 ºC above average and 0.8 ºC higher than same month in 2018.
Mean maximum temperature: 28.2 ºC, 2.1 ºC above average and 2.8 ºC higher than same month in 2018.
Mean temperature: 20.2 ºC, 1.1 ºC above average and 1.8 ºC higher than same month in 2018. This is the third highest on record for September and the equal highest since 20.2 ºC in 2013.
Lowest temperature: 6.9 ºC on 12 September 2019 at 6:10 AM. Same month in 2018 was 7.2 ºC.
Highest temperature: 35.3 ºC at 1:44 PM on 6 September 2019. Same month in 2018 was 31.2 ºC. This is the second highest monthly maximum temperature for September on record.
Lowest maximum temperature: 23.4 ºC at 2:56 PM on 11 September 2019. This month in 2018 was 19.7 ºC.
Highest minimum temperature: 17.1 ºC on 25 September 2019 at 5:12 AM. This month in 2018 was 17.1 ºC.
Minimum temperatures were generally below average over the first half of the month except for some warmer nights in the second week of the month. Most nights in the second half of the month were above average. The month started with a cool period of 2 ºC to 5 ºC below average. It was warmer at 4 ºC above average on the 7th. Cooler conditions followed being 2 to 5 ºC below average between the 10th and 14th. After near average temperatures from the 20th minimum temperatures were between 3 and 5 ºC above average but was 1 ºC to 2 ºC above average on the 23rd, 27th and 29th.
Maximum temperatures during September were predominately above average with a few days close to average and a cool period in the second week of the month. The first 6 days of the month saw mostly above average temperatures of up to 9 ºC above average (on the 4th). Temperatures were 2 to 3 ºC below average on the 9th and 10th. Following mostly close to average temperatures maximum temperatures warmed to 5 ºC above average on the 13th and 14th and 4 ºC above average on the 16th and 17th. Cooler conditions followed with the 27th being 6 ºC above average before near average temperatures returned. Except for the 29th temperatures were 3 ºC to 7 ºC above average on the 27th to 30th
Mean minimum grass temperature: 9.6 ºC (0.4 ºC lower than same month in 2018).
Lowest Minimum Grass Temperature: 4.9 ºC on 12 September 2019 (2.1 ºC higher than same month in 2018). This coincided with the lowest minimum temperature of 6.9 ºC for the month.
Highest Minimum Grass Temperature: 16.2 ºC on 25 September 2019 (0.4 ºC higher than same month in 2018). This coincided with the highest minimum temperature of 17.1 ºC for the month.
Highest Minimum Grass Temperature Depression: 4.2 ºC on 9 September 2019 with a minimum grass temperature of 8.4 ºC and an air temperature of 13.7 ºC.
Lowest Minimum Grass Temperature Depression: 0.9 ºC on 25 September 2019 with a minimum grass temperature of 16.2 ºC and an air temperature of 17.1 ºC.
Mean minimum MSL pressure: 1017 hPa (0.3 hPa lower than same month in 2018). This is the second highest on record for September.
Mean maximum MSL pressure: 1022.5 hPa (0.1 hPa higher than same month in 2018). This is the second highest on record for September.
Mean MSL pressure: 1019.8 hPa (2.2 hPa above average, 0.3 hPa higher than same month in 2018). This is the second highest on record for September.
Lowest MSL pressure: 1006.8 hPa on 6 September 2019 at 3:49 PM. The same month in 2018 saw 1008.9 hPa.
Highest MSL pressure: 1029.5 hPa on 11 September 2019 at 11:21 PM. The same month in 2018 saw 1028.5 hPa.
Mean minimum relative humidity: 21.5 % (26.7 % lower than same month in 2018 and 22.2 % below average). This is the lowest on record for September exceeding the old record of 29.8 % in 2009.
Mean maximum relative humidity: 77.1 % (15.5 % lower than same month in 2018 and 13.7 % below average). This is lowest on record for September exceeding the previous record low of 81.2 % in 2017.
Mean relative humidity: 49.3 % (21.1 % lower than same month in 2018 and 17.9 % below average). This is the lowest on record for September exceeding the previous record of 56.6 % in 2009.
Lowest relative humidity: 1 % on 6 September 2019 at 11:40 AM (24 % lower than this month in 2018). This is the lowest monthly and daily minimum humidity for September on record exceeding the old record of 14 % on 4 September 2014 at 2:50 PM.
Highest relative humidity: 92 % on 2 September 2019 at 6:46 AM (6 % lower than this month in 2018). This is the lowest monthly September maximum humidity on record exceeding the previous record low of 96 % in 2017 on 28 September at 6:05 AM.
Monthly mean minimum dew point: -2.4 ºC (12.1 ºC below average). This is the lowest monthly mean minimum dew point for September on record exceeding the old record of 8.1 ºC in 2015.
Monthly mean maximum dew point: 11.7 ºC (2.3 ºC below average). This is the lowest monthly mean maximum dewpoint for September since 10.7 ºC in 2011.
Monthly mean dew point: 4.7 ºC (7.2 ºC below average). This is the lowest monthly mean dew point for September on record exceeding the previous record low of 9.5 ºC in 2009.
Lowest dew point: -30.9 ºC on 6 September 2019 at 4:48 PM. This is the lowest monthly and daily dew point for September on record, exceeding the previous record of -1.2 ºC on 4 September 2014 at 12:50 AM.
Highest dew point: 17.6 ºC on 21 September 2019 at 8:31 AM.
Highest wind gust: 54 km/hr on 9 September 2019 at 11:22 AM. This is the lowest September maximum wind gust since 50.5 km/hr in 2014 on the 16 September at 3:36 AM.
Highest wind speed: 27 km/hr on 9 September 2019 at 12:58 PM (Moderate Force Wind). This is the lowest monthly maximum wind speed for September on record, exceeding the previous record low of 27.7 km/hr in 2012 on 14 September at 7:30 AM
Total wind run: 4110.1 km (2790.2 km higher than same month in 2018), 2790 km above average and 78.3 % above average. This is the highest on record for September total wind run exceeding the previous record of 1993.8 km in 2017.
Mean wind speed: 5.7 km/hr (3.9 km higher than this month in 2018), 3.6 km/hr above average and 171.1 % above average (approx. 131 % above average accounting for measuring equipment changes). This is the highest on record for September exceeding the previous record high of 2.7 km/hr in 2016.
Daily Mean Maximum Wind Gust: 29.9 km/hr (6.3 km/hr lower than this month in 2018), 2 km/hr below average and 6.3 % below average. This is the lowest mean maximum wind speed on record for September since 28.8 km/hr in 2014.
Daily Mean Maximum Wind Speed: 16.3 km/hr, 2.8 km/hr lower than this month last year, 2.1 km/hr below average and 11.4 % below average. This is the lowest daily mean maximum wind speed on record for September since 14.6 km/hr in 2012.
Dominant Direction: NE (S this month last year).
Rainfall total: 2.8 mm, 30.4 mm below average (8.4 % of long term average), 18.2 mm below the long term median and 13% of the site median. This is lower than this month last year which was 37.9 mm. Automatic rain gauge was 1.8 mm (-35.7 % of manual gauge).
Highest daily rainfall total: 2 mm on 18 September 2019.
Number of rain days: 3 days, 6 less than this month in 2018 and 2.6 days below average.
Highest rain fall rate: 27.4 mm/hr on the 17 September 2019 at 5:57 PM.
Highest hourly rainfall total: 1.8 mm on the 17 September 2019 at 6:29 PM.
There were 1 thunderstorm, with 2 days with thunder, along with 0 nearby thunderstorms.
Very little rainfall observed at Ferny Grove during the month with some light showers bringing low rainfall totals in the second half of the month.
There were 8 days of morning dew.
Smoke haze over much of the month was a result of many bushfires across the region in dangerous conditions which resulted in the loss of several properties across tens of thousands of hectares.
Several days of record low humidity and high temperatures in stable and dry conditions.
For September there were 13 existing records exceeded, along with 4 records that was highest/lowest in at least 5 years.
For more detailed analysis refer to the “Monthly Meteorological Report for September 2019”.
Summary of Averages and Extremes for September 2019 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 |
Average |
12.1 |
28.2 |
20.2 |
16.1 |
9.6 |
2.4 |
21.5 |
77.1 |
49.3 |
1017.0 |
1022.5 |
1019.8 |
4.7 |
29.9 |
16.3 |
0.1 |
Min |
6.9 |
23.4 |
15.6 |
8.2 |
4.9 |
0.0 |
1 |
24 |
15 |
1006.8 |
1014.6 |
1010.7 |
1.8 |
19.0 |
9.0 |
|
Max |
17.1 |
35.3 |
24.9 |
25.8 |
16.2 |
0.0 |
43 |
92 |
66 |
1025.0 |
1029.5 |
1027.3 |
17.6 |
54.0 |
27.0 |
2.0 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2.8 |
Summary for September 2019 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 (%) |
Average |
+1.1 |
-17.9 |
+2.2 |
-7.2 |
-1.5 |
-2.7 |
-30.4 |
8.4 |
Min |
+0.2 |
-22.2 |
|
-12.1 |
|
|
|
|
Max |
+2.1 |
-13.7 |
|
-2.3 |
|
|
-14.8 |
|
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 |
May-19 |
13.1 |
24.7 |
4.4 |
28.0 |
18.9 |
+0.7 |
+1.4 |
+1.0 |
41.4 |
-61.6 |
16 |
Jun-19 |
10.9 |
22.5 |
4.4 |
27.7 |
16.7 |
+0.7 |
+1.4 |
+1.0 |
35.9 |
-26.0 |
15 |
Jul-19 |
9.5 |
23.5 |
5.1 |
27.2 |
16.5 |
+0.8 |
+2.4 |
+1.6 |
17.6 |
-15.9 |
10 |
Aug-19 |
9.7 |
24.3 |
6.2 |
28.6 |
17.0 |
+0.7 |
+1.2 |
+1.0 |
11.2 |
-24.3 |
4 |
Sep-19 |
12.1 |
28.2 |
6.9 |
35.3 |
20.2 |
+0.2 |
+2.1 |
+1.1 |
2.8 |
-30.4 |
3 |
YTD |
14.9 |
27.2 |
4.4 |
41.1 |
21.0 |
+0.6 |
+1.5 |
+1.1 |
460.9 |
-332.9 |
104 |
Data copyright Ferny Grove Weather 2019, Produced 10/10/2019. 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.