August saw very cool nights with the mean minimum temperature well below average and the lowest in 5 years. Rainfall was below average but ranked historically as average. Mean relative humidity was record low, mean dew point was below average and mean air pressure was below average. There was 1 nearby thunderstorm.
Mean minimum temperature: 6.1 ºC, 2.9 ºC below average and 1.7 ºC lower than same month in 2017. This is the second lowest on record and the lowest since the current record of 6 C in 2012.
Mean maximum temperature: 24.5 ºC, 1.4 ºC above average and 0.1 ºC lower than same month in 2017.
Mean temperature: 15.3 ºC, 0.7 ºC below average and 0.4 ºC higher than same month in 2017. This is the second lowest on record and the lowest since the record low of 14.4 in 2012.
Lowest temperature: 2.0 ºC at 6:29 AM on 14 August 2018. Same month in 2017 was 3.1 ºC. This is the second lowest monthly minimum temperature for August and the lowest since 0.7 ºC on 3 August 2012.
Highest temperature: 29.4 ºC at 1:46 PM on 17 August 2018. Same month in 2017 was 31.6 ºC.
Lowest maximum temperature: 19.5 ºC at 4:25 PM on 26 August 2018. This month last year was 21.6 ºC.
Highest minimum temperature: 10.6 ºC at 12:30 AM on 26 August 2018. This is the lowest monthly highest minimum temperature for August. The old record was 12.9 C on the 17 August 2017 at 7:10 AM. This month last year was 12.9 ºC.
In August minimum temperatures were mostly near or below average with only a few below average nights. On the 1st it was 6 ºC below average and easing to 3 ºC below average on the 2nd. The 5th was 3 ºC below average and the 7th was 2 ºC above average. A cool spell then followed with the 8th being 6 ºC below average, the 9th 5 ºC below average and the 10th 3 ºC below average. After easing it cooled again to 6 ºC below average on the 13th, 7 ºC below average on the 14th, 5 ºC below average on the 15th and 3 ºC below average on the 16th. This continued with the 17th being 4 ºC below average, the 18th and 19th 3 ºC below average. This cooled further on the 21st to 7 ºC below average, the 22nd was 6 ºC below average and the 23rd was 4 ºC below average. It was 4 ºC below average on the 29th and 6 ºC below average on the 30th.
Maximum temperatures in August were almost entirely average to above average with almost no days below average and many days well above average. The temperature increased to 4 ºC above average on the 4th before easing slightly to 3 ºC above average on the 5th. The 6th was 4 ºC above average. On the 15th it warmed to 4 ºC above average and further to 6 ºC above average on the 16th and 17th. The 18th was 5 ºC above average before easing to within 2 ºC of the long term average for the rest of the month. The exception was the 26th which was 3 ºC below average and the 31st being 3 ºC above average.
Mean minimum grass temperature: 4.9 ºC (1.2 ºC lower than same month in 2017)
Lowest Minimum Grass Temperature: 0.9 ºC on 14 August 2018 (1 ºC lower than same month in 2017). This was with an air temperature of 2.4 ºC.
Highest Minimum Grass Temperature: 9.0 ºC on 26 August 2018 (2.7 ºC lower than same month in 2017). This coincided with the highest minimum of 10.6 C for the month.
Mean minimum MSL pressure: 1014.5 hPa (0.4 hPa lower than same month last year). This is the equal second lowest on record and the equal lowest since 1014.5 hPa in 2013.
Mean maximum MSL pressure: 1020.7 hPa (0.2 hPa lower than same month last year).
Mean MSL pressure: 1017.6 hPa (0.9 hPa below average, 0.3 hPa lower than same month last year).
Lowest MSL pressure: 1007.8 hPa on 6 August 2018 at 4:47 PM. The same month last year saw 1007.6 hPa. This is the highest monthly minimum August pressure on record since 1009.1 hPa on 17 August 2012 at 5:47 PM.
Highest MSL pressure: 1026.2 hPa on 14 August 2018 at 9:55 AM. The same month last year saw 1025 hPa.
Mean minimum relative humidity: 33.8 % (4.4 % lower than same month last year and 10.4 % below average). This is the lowest on record with the old record being 35.6% in 2009.
Mean maximum relative humidity: 84 % (0.6 % higher than same month last year and 3.9 % below average. This is second lowest on record with the record low being 83.4% in 2017.
Mean relative humidity: 58.9 % (1.9% lower than same month last year and 8.1% below average). This is the lowest on record exceeding the old record low of 60.8% in 2017.
Lowest relative humidity: 17% on 13 and 21 August 2018 at 3:55 PM on the 21st (4% lower than this month last year). This is the second lowest monthly and daily August minimum humidity on record and the lowest since 11% on 2 August 2014 at 3:14 PM.
Highest relative humidity: 98% on 26 August 2018 at 12:06 PM, (1% higher than this month last year).
Monthly mean minimum dew point: 2.9 ºC (4.2 ºC below average)
Monthly mean maximum dew point: 10.6ºC (0.3 ºC below average)
Monthly mean dew point: 6.8 ºC (2.2 ºC below average)
Lowest dew point: -4.8 ºC on 21 August 2018 at 3:41 AM. This is the lowest on record for August exceeding the previous record of -3.4 C on 2 August 2014 at 1:56 PM.
Highest dew point: 16.5 ºC on 5 August 2018 at 8:30 AM
Highest wind gust: 79.1 km/hr on 19 August 2018 at 11:19 AM. This is the highest August maximum wind gust on record and the old record being 70 km/hr on 25 August 2016 at 10:36 AM. The maximum wind gust this month last year was 68.7 km/hr.
Highest wind speed: 43.7 km/hr on 19 August 2018 at 11:20 AM (Strong force Wind). This is a new record high for August exceeding the old record of 41.4 km/hr on 19 August 2017 at 9:25 AM.
Wind Run: 1359.6 km (139.6 km less than same month last year) and is the fourth lowest for August on record and the lowest since 1312.1 km in 2013.
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: .8 km/hr (0.2 km lower than this month last year). This is the equal third lowest on record shared with 2015 and the lowest since 1.3 km/hr in 2013.
Daily Mean Maximum Wind Speed: 17.5 km/hr
Dominant Direction: SW (WSW 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).
Rainfall total: 17.1 mm, 13.3 mm below average (51.6 % of long term average), 0.3 mm above the long term median and 101.8% of the site median. This is higher than this month last year which was 11.1 mm. Automatic rain gauge was 11.9 mm (-15.2% of manual gauge).
Highest daily rainfall total: 14.6 mm on 30 September 2018.
Number of rain days: 3 days, 2 lower than this month last year and 2.2 days below average. This is the lowest for August since 0 days in 2013.
Highest rain fall rate: 19.2 mm/hr on the 26 August 2018 at 10:13 AM
Highest hourly rainfall total: 4.7 mm on the 26 August 2018 at 10:44 AM.
There were 0 thunderstorms, with 0 days with thunder, along with 1 nearby thunderstorms.
At Ferny Grove there were late afternoon light showers on the 6th, followed by early evening light to moderate and briefly heavy showers. 3.5 mm was measured on the 7th. On the 24th there was an evening nearby thunderstorm with a few drops of rain and then a very brief light evening shower with a trace measured the next day. On the 26th there were light to moderate showers in the early hours becoming light to moderate rain at times from 4 am, less frequent between 6 am and 7pm and then light falls from 10:30 AM. In the early afternoon this eased to light rain before clearing. On the 26th 6.5 mm was measured followed by 7.1 mm on the 27th.
On the 12th was a moderate to fresh south-westerly wind change in the afternoon of the 12th that brought very dry air and cold mornings in the following days
Cloudy and cool on he 26th which brought some showers followed by a dry change.
For August there was 4 existing records exceeded, along with 10 records that was highest/lowest in at least 5 years.
For more detailed analysis refer to the “Monthly Meteorological Report for August 2018”.
Summary of Averages and Extremes for August 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 |
6.1 |
24.5 |
33.8 |
84.0 |
1014.5 |
1020.7 |
30.8 |
17.5 |
0.6 |
15.3 |
18.4 |
4.9 |
-1.2 |
Min |
2.0 |
19.5 |
17.0 |
53.0 |
1007.8 |
1015.4 |
9.1 |
4.5 |
0.0 |
12.6 |
8.9 |
0.9 |
-1.9 |
Max |
10.6 |
29.4 |
70.0 |
98.0 |
1020.3 |
1026.2 |
79.1 |
43.7 |
7.1 |
18.5 |
24.4 |
9.0 |
-0.2 |
Total |
- |
- |
- |
- |
- |
- |
- |
- |
17.1 |
- |
- |
- |
- |
Summary for August 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 |
-8.1 |
-0.9 |
-16.0 |
17.1 |
33.1 |
51.6 |
Min |
-2.9 |
-10.4 |
- |
- |
- |
- |
- |
Max |
+1.4 |
-3.9 |
- |
-9.5 |
- |
- |
- |
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 |
YTD |
13.6 |
27.0 |
1.8 |
38.0 |
20.3 |
-0.9 |
+1.4 |
+0.2 |
709.3 |
-60.3 |
93 |
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 6/7/20 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 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. Daily rainfall and air temperature are measured as per the information with the colour coded table. Minimum Grass Temperature is measured over an approx. 12 hour period ending in the early morning.
Automatic records listed 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. 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. However, the automatic record may be used if data is not available/ not suitable and particularly for wind gust.
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”.