Night and day temperatures were cooler than normal at Ferny Grove. Rainfall was near average at Ferny Grove. Mean relative humidity was above average, mean dew point was above average and mean air pressure was near average. There were 6 thunderstorms.
Mean minimum temperature: 11.3 ºC, 0.6 ºC below average and 0.4 ºC lower than same month in 2017.
Mean maximum temperature: 25.4 ºC, 0.8 ºC below average and 3 ºC lower than same month in 2017.
Mean temperature: 18.4 ºC, 0.7 ºC below average and 1.7 ºC lower than same month in 2017.
Lowest temperature: 7.2 ºC at 6:40 AM on 2 September 2018. Same month in 2017 was 4.6 ºC.
Highest temperature: 31.2 ºC at 1:47 PM on 29 September 2018. Same month in 2017 was 36.6 ºC.
Lowest maximum temperature: 19.7 ºC at 8:59 AM on 30 September 2018. This is the equal second lowest monthly September lowest maximum temperature and equal second lowest September daily maximum temperature on record.
Highest minimum temperature: 17.1 ºC at 2:28 AM on 30 September 2018. This month last year was 17.5 ºC.
In September minimum temperatures were mostly below average over the first 20 days of the month and generally above average for the rest of the month. It cooled to 5 C below average on the 2nd, before easing to 3 C below average on the 3rd and to 2 C below average on the 4th and 5th. The 7th was 2 C below average before warming to 4 C above average on the 8th. The 9th was 2 C below average, the 10th and 11th was 3 C below average and the 12th and 13th was 2 C below average. The 18th was 2 C below average and also on the 21st and warming to 2 C above average on the 22nd. There were warm nights at the end of the month with the 25th being 2 C above average on the 25th. On the 28th it was 2 C above average, 1 C above average on the 29th and 5 C above average on the 30th and the warmest minimum for the month.
Maximum temperatures in September were cooler than normal over many days, particularly the first half of the month. There were a few warm days, mostly over the second half of the month. It cooled to 6 C below average on the 3rd and 5 C below average on the 4th and 5th. The 6th was 3 C below average and close to average on the 7th to 14th. It warmed to 3 C above average on the 15th and 16th. The 17th and 18th was 2 C below average and rising to 5 C above average on the 20th. The 25th was 5 C below average, and 2 C above average on the 28th. The 29th was 5 C above average and the hottest day of the month while the 30th was the coolest day of the month being 6 C below average.
Mean minimum grass temperature: 6 ºC on 2 September 2018 (3ºC higher than same month in 2017). This was with an air temperature of 7.2 ºC.
Lowest Minimum Grass Temperature: 8.9 ºC on 1 October 2018 (3ºC higher than same month in 2017). This was with the lowest air temperature for the month of 9.3 ºC.
Highest Minimum Grass Temperature: 15.8 ºC on 30 September 2018 (0.4 ºC higher than same month in 2017). This coincided with the highest minimum of 17.1 C for the month.
Mean minimum MSL pressure: 1016.7 hPa (2.6 hPa higher than same month last year). This is the second highest on record and highest since the current record of 1017.2 hPa in 2015.
Mean maximum MSL pressure: 1022.4 hPa (2.2 hPa higher than same month last year). This is the second highest on record and the highest since 1022.9 hPa in 2015.
Mean MSL pressure: 1019.5 hPa (2 hPa above average, 0.3 hPa lower than same month last year). This is the second highest on record and highest since 1020.1 hPa in 2015.
Lowest MSL pressure: 1008.9 hPa on 1 September 2018 at 3:44 PM. The same month last year saw 1007.3 hPa. This is the highest monthly minimum September pressure on record, exceeding the old record of 1008 hPa on 3 September 2015 at 2:28 PM.
Highest MSL pressure: 1028.5 hPa on 22 September 2018 at 7:46 AM. The same month last year saw 1027.7 hPa.
Mean minimum relative humidity: 47.9 % (11.6 % higher than same month last year and 4.2% above average).
Mean maximum relative humidity: 92.6 % (11.3 % higher than same month last year and 1.8 % above average). This is the highest since 94.9 % in 2011.
Mean relative humidity: 70.3 % (11.5 % higher than same month last year and 2.9 % above average). This is the second highest on record with the current record being 74.7 % in 2010.
Lowest relative humidity: 25% on 20 September 2018 at 12:37 PM (5% higher than this month last year).
Highest relative humidity: 98% on 5th, 8th, 9th, 27th and 29th and 30th September 2018 at 4:28 AM on the 30th, (2% higher than this month last year). This is the second highest monthly September high humidity.
Monthly mean minimum dew point: 9.8 ºC (0.4 ºC below average)
Monthly mean maximum dew point: 15.1ºC (1.7 ºC above average)
Monthly mean dew point: 12.4 ºC (0.6 ºC above average)
Lowest dew point: 5.5 ºC on 2 September 2018 at 6:12 AM
Highest dew point: 19.1 ºC on 29 August 2018 at 3:51 PM
Highest wind gust: 68.7 km/hr on 19 September 2018 at 4:48 PM. This is the second highest September maximum wind gust and the current record being 70 km/hr on 19 September 2016 at 7:43 AM. The maximum wind gust this month last year was 66 km/hr.
Highest wind speed: 45.7 km/hr on 8 September 2018 at 7:38 AM (Strong force Wind).
Total wind run: 1319.9 km (673.9 km less than same month last year) and is the second lowest for September on record and the lowest since 1053.6 km in 2012.
Mean wind speed: 1.8 km/hr (0.8 km lower than this month last year). This is the second lowest on record and the lowest since 1.5 km/hr in 2012.
Daily Mean Maximum Wind Speed: 19.1 km/hr
Dominant Direction: SSW (WNW this month last year). Use with caution This is due to equipment failure since December 24 2017 with three hourly readings used from December 25 2017 (instead of at least 5 minute intervals) from backup sensor. No data available from 26th due to equipment failure, with no subsequent backup data available.
Rainfall
Rainfall total: 37.9 mm, 0.5 mm above average (101.3 % of long term average), 163 mm above the long term median and 175.3% of the site median. This is higher than this month last year which was 1.7 mm. Automatic rain gauge was 33.1 mm (-12.7 % of manual gauge).
Highest daily rainfall total: 14.6 mm on 30 September 2018.
Number of rain days: 9 days, 1 higher than this month last year and 3.4 days above average.
Highest rain fall rate: 80.4 mm/hr on the 8 September 2018 at 4:49 PM
Highest hourly rainfall total: 8.8 mm on the 8 September 2018 at 5:22 PM.
There were 6 thunderstorms, with 3 days with thunder, along with 0 nearby thunderstorms.
During September little rainfall was measured during the middle of the month. Showers occurred early in the month with a thunderstorm on the 8th. Rainfall later in the month was mostly from several thunderstorms and also some rain.
Hazy with dry air during the middle of the month after a dry wind change on the 16th.
There were several cloudy and cool days associated with the rainfall.
For September there was 1 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 2018”.
Summary of Averages and Extremes for September 2018 for Ferny Grove, Brisbane, Queensland, Australia |
|
|
|
|
|
||||||||
|
Min Temperature |
Max Temperature |
Min Relative Humidity |
Max Relative Humidity |
Min pressure |
Max pressure |
Max Wind Gust |
Max Wind Speed |
Daily rain |
Daily Avg. Temp |
Daily Temp Range |
Min Grass Temp |
Min Grass Temp Depression |
Average |
11.3 |
25.4 |
47.9 |
92.6 |
1016.7 |
1022.4 |
36.2 |
19.1 |
1.3 |
18.4 |
14.0 |
10.0 |
-1.4 |
Min |
7.2 |
19.7 |
25.0 |
77.0 |
1008.9 |
1013.8 |
15.6 |
4.3 |
|
14.8 |
2.6 |
6.0 |
-2.0 |
Max |
17.1 |
31.2 |
78.0 |
98.0 |
1022.9 |
1028.5 |
68.7 |
45.7 |
14.6 |
22.2 |
20.2 |
15.8 |
-0.4 |
Total |
|
|
|
|
|
|
|
|
37.9 |
|
|
|
|
Summary for September 2018 from long term average for Ferny Grove, Brisbane, Queensland, Australia |
|||||||
|
Temperature |
Relative Humidity |
Air Pressure |
Daily Rainfall |
Rain total |
Rain total long term average |
Fraction of monthly average (%) |
Average |
-0.7 |
+2.9 |
+2.0 |
+0.5 |
37.9 |
37.4 |
101.3 |
Min |
-0.6 |
+4.2 |
|
|
|
- |
- |
Max |
-0.8 |
+1.8 |
|
+20.3 |
|
- |
- |
Monthly averages and extremes for Year of 2018 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 |
|
|
|
Jan-18 |
19.1 |
32.9 |
13.8 |
38.0 |
26.0 |
-1.7 |
+2.1 |
+0.2 |
62.4 |
-81.9 |
9 |
Feb-18 |
19.7 |
30.5 |
14.2 |
37.4 |
25.1 |
-0.5 |
+0.4 |
-0.1 |
305.3 |
+138.4 |
17 |
Mar-18 |
19.4 |
28.9 |
14.9 |
35.5 |
24.2 |
+0.7 |
+0.5 |
+0.6 |
190.3 |
+85.8 |
25 |
Apr-18 |
16.0 |
28.3 |
11.7 |
33.1 |
22.1 |
-0.1 |
+1.4 |
+0.6 |
40.1 |
-76.7 |
17 |
May-18 |
11.5 |
25.1 |
6.0 |
28.5 |
18.3 |
-0.9 |
+1.7 |
+0.4 |
47.3 |
-54.2 |
9 |
Jun-18 |
8.6 |
22.5 |
4.3 |
25.1 |
15.6 |
-1.6 |
+1.4 |
-0.1 |
25.9 |
-32.0 |
7 |
Jul-18 |
8.1 |
23.4 |
1.8 |
27.9 |
15.8 |
-0.7 |
+2.3 |
+0.8 |
20.9 |
-23.7 |
6 |
Aug-18 |
6.1 |
24.5 |
2.0 |
29.4 |
15.3 |
-2.9 |
+1.4 |
-0.7 |
17.1 |
-16.0 |
3 |
Sep-18 |
11.3 |
25.4 |
7.2 |
31.2 |
18.4 |
-0.6 |
-0.8 |
-0.7 |
37.9 |
+0.5 |
9 |
YTD |
13.3 |
26.8 |
1.8 |
38.0 |
20.1 |
-0.9 |
+1.2 |
+0.1 |
747.2 |
-59.8 |
102 |
Based on Bureau of Meteorology climate summaries (Copyright) of which some data was obtained from. From September 2017 the Bureau of Meteorology climate summaries were expanded to provide data from official stations in and near the Greater Brisbane “Greater Capital City Statistical Area” (GCCSA).
Data copyright Ferny Grove Weather 2018, Produced 15/11/19 utilising data as of 2/12/18. 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 2018 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 from midnight. Daily rainfall (manual) and air temperature are measured as the 24 hours from 9am for maximum temperatures and the 24 hours to 9am for minimum temperatures. Minimum Grass Temperature is measured over an approx. 12 hour period ending in the early morning.
Automatic records in “Other Records” and listed elsewhere under 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. 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 were 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 daily rainfall doesn’t form the official data for the site. However the automatic record for some data and also 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 2014/15 average from the station record. Long term average for rainfall is based on 1987 to 2013 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. 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”.