Overnight temperatures were close to average and daytime temperatures were above average. Most of the official sites observed above average overnight temperatures. Rainfall was very low at Ferny Grove with only 25 % of the long term average measured and was the lowest in over 20 years. Mean relative humidity was below average, mean air pressure was near average, mean dew point was close to average and wind speed was above average. There were 5 thunderstorms.
Seasonal mean minimum temperature: 20.4 ºC, 0.4 ºC above average and 1.2 ºC higher than same season in 2017-18.
Seasonal mean maximum temperature: 31.2 ºC, 0.9 ºC above average and 0.5 ºC higher than same season in 2017-18.
Seasonal mean temperature: 25.8 ºC, 0.7 ºC above average, 0.4 ºC higher than same season in 2017-18
Lowest temperature: 14.9 ºC at 4:56 AM on 26 December 2018. For summer this is the second highest minimum temperature on record and the highest since the current record 16.6 ºC in 2009-10 on the 3 December 2009.
Highest temperature: 39.8 ºC at 2:47 PM on 21 December 2018. Same season in 2017-18 was 38.0 ºC. For summer this is the third highest seasonal and daily maximum temperature and the highest since 40.5 C in 2016-17 on 12 February 2017 at 1:06 PM.
Lowest maximum temperature: 23.9 ºC at 9:00 AM on 16 December 2018. This season in 2017-18 was 21.5 ºC.
Highest minimum temperature: 25 ºC on 14 February 2019 at 5:55 AM. This season in 2017-18 was 25.2 ºC
The monthly mean temperature for December was 0.5 ºC above average with a mean temperature recorded as 24.9 ºC. January was 0.6 ºC above average with a mean temperature of 26.4 ºC and February was 0.9 ºC above average with a mean temperature of 26 ºC. In December the mean minimum temperature was 0.5 ºC above average with a mean minimum temperature of 19.5 ºC, easing to equal to the long term average in January with a mean minimum temperature of 20.8 ºC. February saw a mean minimum temperature of 20.9 ºC which was 0.7 ºC above average. The December mean maximum temperature was 0.5 ºC above average with an observed mean maximum temperature of 30.4 ºC. January was 0.6 ºC above average with a mean maximum temperature of 32 ºC while February warmed to 0.9 ºC above average at an observed mean maximum temperature of 31.2 ºC. The mean minimum temperature for the season was 20.4 ºC (0.4 ºC above average), the mean maximum temperature was 0.9 C above average with a mean maximum temperature of 31.2 C with the seasonal mean temperature being 0.7 C above average with a temperature of 25.8 C.
In December minimum temperatures were warm during the middle of the month and some of the start of the month. Cool nights were present at the end of the month. The 1st was 2 ºC above average, and warming to 4 ºC above average on the 3rd and the highest for the month. There were 9 warm nights from the 14th. The 14th and 15th was 3 ºC above average, the 16th was 4 ºC above average, 3 ºC above average on the 17th and 3 ºC above average on the 18th. The 19th and 20th was 3 ºC above average, the 21st was 4 ºC above average and the 22nd was 3 ºC above average. It cooled to 4 ºC below average on the 25th and the coolest temperature of the month on the 26th.
Minimum temperatures during January were generally close to or below average with some warm nights early in the month and on some nights at the end of the month. The 2nd was 2 ºC below average before a warmer than normal from the 6th to 10th of up to 2 ºC above average. The 8th was 2 ºC above average and the 10th was 2 ºC above average. It was then cooler from the 11th with the 12th was 2 ºC below average and the 13th was 1 ºC below average. After close to normal temperatures it was 2 ºC below average on the 18th, 3 ºC below average on the 19th and then back to near average from the 20th. It warmed to 2 ºC above average on the 24th and 2 ºC above average on the 25th.
Minimum temperatures during February were mostly above average with some close to average nights. Cool nights were confined to some days over the second half of the month. The 2nd, 8th and 10th was 2 ºC above average. The 11th was 2 ºC above average, while the 13th was 2 ºC above average. The 14th saw the highest temperature and was 5 ºC above average and cooling to 2 ºC below average on the 15th. A short cool period followed with near average temperatures except for 2 ºC below average on the 19th. The 21st warmed to 4 ºC above average and the 22nd was 3 ºC above average. At the end of the month it cooled again close to average except for 3 ºC below average on the 27th which was the lowest temperature for the month.
Maximum temperatures in December were high on a few days at the very start of the month and during the middle of the month. There were some cool days in first half of the month and otherwise close to average. The 1st was 6 ºC above average, and 7 ºC above average on the 2nd. A cool period then followed from the 5th. The 5th was 2 ºC below average on the 5th, 3 ºC below average on the 6th, 6 ºC below average on the 7th and 5 ºC below average on the 8th. The 9th was 2 ºC below average before a warm period with the 10th to 12th being 1 ºC above average. It fell to 6 ºC below average on the 16th. A short period of high temperature followed with the 20th being 6 ºC above average, the 21st was 10 ºC above average and the highest for the month and the 22nd was 6 ºC above average. It was then 3 ºC below average on the 23rd and 24th.
Maximum temperatures in January were almost entirely above average with some near or below average days in the first 10 days of the month. From the 15th to 31st maximum temperatures were between 2 and 4 ºC above average. The 1st and 2nd was 2 ºC above average and close to average until the 9th. From the 10th to end of the month was a warm spell with temperatures of between 32 and 34 ºC. It was 2 ºC above average on the 12th to 14th, 3 ºC above average on the 15th and 4 ºC above average on the 16th. The 17th was 3 ºC above average, 2 ºC above average on the 18th, 4 ºC above average on the 19th (the highest temperature for the month) and 3 ºC above average on the 20th. The 21st and 22nd was 2 ºC above average, 4 ºC above average on the 23rd, 3 ºC above average on the 24th to 28th. The 29th and 30th was 2 ºC above average and the 31st was 3 ºC above average.
Maximum temperatures of February were mostly above average with cool days mostly at the end of the month. The peak of the heat was during the middle of the month. Temperatures at the start of the month were close to average except for 3 ºC above average on the 1st. A warm to hot period then followed and interspersed with a slightly warm period. The 9th and 10th was 3 ºC above average, the 11th was 2 ºC above average warming to 6 ºC above average on the 12th and 7 ºC above average on the 13th which was the highest temperature for the month. The warmth returned with the 19th and 20th being 4 ºC above average, the 21st was 3 ºC above average and the 22nd was 2 ºC above average. Temperatures were close to average on the 23rd and 24th before 2 to 4 ºC below average temperatures from the 25th except for 1 ºC below average on the 27th.
Monthly mean minimum grass temperature: 19.1 ºC, 0.5 ºC higher than same month in 2018.
Seasonal Average Minimum Grass Temperature: 18.6 ºC (0.1 ºC higher than same season in 2017-18)
Lowest minimum grass temperature: 13.0 ºC on 25 and 26 December 2018 (0.8 ºC higher than same month in 2018).
Highest minimum grass temperature: 22.6 ºC on 14 February 2019 (1.4 ºC lower than same month in 2018).
Highest Minimum Grass Temperature Depression: 2.8 ºC on 17 February 2019 with a minimum grass temperature of 16.3 ºC and an air temperature of 19.1 ºC.
Lowest Minimum Grass Temperature Depression: 0.1 ºC on 6 February 2019 with a minimum grass temperature of 20.9 ºC and an air temperature of 21 ºC.
Seasonal Mean Minimum Pressure: 1011.4 hPa (1.8 hPa higher than same season in 2017-18). This is the second highest on record and the highest since the current high record of 1016.4 hPa in 2009-10.
Seasonal Mean Maximum Pressure: 1015.8 hPa (1.6 hPa higher than same season in 2017-18). This is the second highest on record and the highest since the current record high of 1018.1 hPa in 2009-10.
Seasonal Mean Pressure: 1013.6 hPa (0.5 hPa above average) and equal to same season in 2017-18. This is the highest since the current record high of 1017.2 hPa in 2009-10 and the second highest on record.
Lowest Seasonal MSL Pressure: 1000.4 hPa on 2 December 2018 at 3:58 PM. The same season in 2017-18 saw 1001.1 hPa.
Seasonal Highest MSL Pressure: 1023.5 hPa on 25 February 2019 at 9:08 AM. The same season in 2017-18 was 1022.8 hPa.
Seasonal Mean Minimum Relative Humidity: 44.1% (7 % lower than same season in 2017-18 and 11.2% below average). This is the lowest on record exceeding the previous record of 45.6% in 2009-10.
Seasonal Mean Maximum Relative Humidity: 84.8% (6.4% lower than same season in 2017-18 and 7.5% below average). This is the lowest on record with the old record being 88.2% in 2010.
Seasonal Mean Relative Humidity: 64.4 % (6.7 % lower than same season in 2017-18 and 3.1 % below average). This is lowest on record beating the previous record of 66.9 % in 2009-10.
Lowest Seasonal Humidity: 13% on 1 December 2018 at 12:23 PM (13% lower than this month in 2017 and 25% lower than same season in 2017-18). For summer on a seasonal and daily basis this is the second lowest minimum relative humidity and the lowest since the current record low of 10% on 5 December 2012 at 5:15 PM.
Seasonal Highest Humidity: 97% on 16, 17 and 18 December 2018 at 12:23 AM on the 18 December (2% lower than this month in 2017). For summer this is the lowest maximum relative humidity on record, exceeding the old record of 98% in 2016-17 on the 28 January 2017 at 6:55 AM.
Seasonal mean minimum dew point: 15.6 ºC (2.4 ºC below average). This is the lowest seasonal mean minimum dew point on record, exceeding the previous record of 17 ºC in 2011-12.
Seasonal mean maximum dew point: 20.2 ºC (1.6 ºC above average). This is the second lowest seasonal mean maximum dew point on record with the lowest on record being 18.6 ºC in 2009-10.
Seasonal mean dew point: 17.9 ºC (3.9 ºC below average). This is the lowest seasonal mean dew point on record, exceeding the previous record of 18.6 ºC in 2013-14.
<[] class="block_4" id="calibre_link-9">Lowest dew point: 8.7 ºC on 28 January 2019 at 11:49 AM. This is the second lowest monthly minimum dew point on record, the lowest since 7.6 ºC in 2011-12 on 11 January 2012 at 10:20 PM, the third lowest daily dew point for January and the lowest since 8.3 ºC in 12 January 2012 at 12:30 AM.
Highest dew point: 24.7 ºC on 13 February 2018 at 2:40 PM. This is the fifth lowest and highest monthly maximum dew point on record, the lowest since 24.2 ºC in 2015 on 22 February at 3:58 PM, equal twelfth highest daily dew point for February and the highest since 24.8 ºC on 24 February 2018 at 11:43 PM.
Maximum Wind Gust: 48 km/hr on 21 December 2018 at 5:45 PM. The maximum wind gust this month last year was 60 km/hr and this season in 2017-18 was 99.8 km/hr. For summer this is the second lowest maximum seasonal wind gust and the lowest since 46.5 km/hr in 2009-10 on 15 February 2010
Maximum Wind Speed: 25 km/hr on 2 December 2018 at 12:19 PM (Moderate Force Wind). This is the lowest monthly maximum wind speed for February on record, exceeding the previous record low of 27.1 km/hr on 31 December 2011 at 8:40 AM. This month in 2017 and this season in 2017-18 was 41.6 km/hr.
Seasonal Wind Run: 11,689.8 km. This is the highest on record exceeding the old record in 2015-16 of 5754.3 km. This season last year was 4230.0 km.
Seasonal Mean Wind Speed: 3.0 km/hr (3.5 km/hr higher than this season in 2017-18) and the highest on record, with the old record being 2.6 km/hr in 2015-16.
Daily Mean Maximum Wind Gust: 28.4 km/hr (6.1 km lower than this season in 2017-18), 2.8 km/hr below average and 5.6 % below average. This is the lowest daily mean maximum wind gust on record since 23.7 km/hr in 2011-12.
Daily Mean Maximum Wind Speed: 14.3 km/hr, 4.7 km/hr lower than this month last year and 4.3 km/hr below average. This is the second lowest daily mean maximum wind speed on record and the lowest since the current record low of 13.2 km/hr in 2011-12.
Dominant Direction: ESE (SSW this season in 2017-18).
Rainfall total: 131.1 mm, 318.5 mm below average (29.4 % of long term average), 239.9 mm below the long term median and 35.3 % of the site median. This is the second lowest summer rainfall on record, the lowest since 113.5 mm in 1996-97 and ranks as decile 1 /3rd percentile and as very low. This is lower than this season in 2017-18 which was 456.6 mm. Automatic rain gauge was 107 mm (-22.5 % of manual gauge).
Highest daily rainfall total: 20.2 mm on 6 February 2019.
Number of rain days (0.1 mm or greater): 35 days, 7 less than last year and 2.3 below average.
Highest rainfall rate was 104.8 mm/hr on the 6 February 2019 at 11:48 PM
Highest hourly rainfall was 8.2 mm on the 16 December 2018 at 5:05 AM. This is the second lowest monthly maximum hourly rainfall for December, the lowest since the current record low of 6.2 mm in 2013 at 4:13 PM on the 5th. For summer this is the lowest seasonal maximum hourly rainfall exceeding the previous record low of 13.5 mm in 2012-13 on 26th December at 6:35 AM
There were 5 thunderstorms, with 3 days with thunder, along with 3 nearby thunderstorms.
Highest hourly rainfall was 8.2 mm on the 16 December 2018 at 5:05 AM. This is the second lowest monthly maximum hourly rainfall for December, the lowest since the current record low of 6.2 mm in 2013 at 4:13 PM on the 5th, twelfth highest daily maximum hourly rainfall and the highest since 20.7 mm on 31 December 2018 at 3:09 PM. For summer this is the lowest seasonal maximum hourly rainfall exceeding the previous record low of 13.5 mm in 2012-13 on 26th December at 6:35 AM, twenty-eighth highest daily maximum hourly rainfall and the highest since 44 mm on 26 February 2018
A very hot day and humid on the 21st with a late mild thunderstorm with gusty moderate W to SW winds
High pressure ridging developed in the last week of the month with fine weather.
For December there were 4 existing records exceeded, along with 7 records that were highest/lowest in at least 5 years.
There were no days of morning dew.
The temperature was quite variable on the 3rd and fell four times during the day.
Persistent high pressure ridging brought a static weather pattern with resulting long warm spell, higher air pressure and lower humidity than is typical for January.
For January there were 5 existing records exceeded, along with 8 records that were highest/lowest in at least 5 years.
There was 1 day of morning dew.
Low dewpoint and relative humidity on the 22nd with light to moderate and gusty SSE to SW winds in the afternoon with Ex Tropical Cyclone Oma well offshore
High pressure ridging over most of the month brought most rainfall for the month with persistent warm temperatures and lower humidity than is usual for February.
For February there were 8 existing records exceeded, along with 6 records that were highest/lowest in at least 5 years.
For the season there were 5 existing records exceeded, along with 24 records that were highest/lowest in at least 5 years.
For more detailed analysis refer to the “Seasonal Meteorological Report of summer 2018-19”.
Summary of Averages and Extremes for summer 2018-19 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 |
December |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
19.5 |
30.4 |
24.9 |
10.9 |
17.8 |
1.6 |
46.0 |
87.8 |
67.0 |
1011.1 |
1016.1 |
1013.6 |
17.7 |
28.7 |
14.7 |
2.6 |
Min |
14.9 |
23.9 |
21.2 |
1.1 |
13.0 |
2.5 |
13.0 |
73.0 |
52.5 |
1000.4 |
1008.6 |
1005.1 |
15.3 |
19.0 |
9.0 |
|
Max |
23.3 |
39.8 |
31.2 |
17.9 |
21.9 |
0.5 |
90.0 |
97.0 |
93.5 |
1019.4 |
1021.8 |
1020.6 |
20.0 |
48.0 |
25.0 |
36.0 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
80.1 |
January |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
20.8 |
32.0 |
26.4 |
11.1 |
19.0 |
1.9 |
42.5 |
85.7 |
64.1 |
1013.0 |
1016.8 |
1014.9 |
18.3 |
26.7 |
13.6 |
0.9 |
Min |
18.5 |
28.9 |
24.6 |
7.0 |
16.7 |
2.6 |
32.0 |
77.0 |
58.5 |
1010.1 |
1014.4 |
1012.7 |
8.7 |
19.0 |
10.0 |
|
Max |
22.9 |
34.3 |
28.1 |
15.1 |
21.3 |
0.8 |
58.0 |
94.0 |
73.5 |
1015.8 |
1019.5 |
1017.6 |
21.9 |
37.0 |
19.0 |
4.4 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
11.2 |
February |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
20.9 |
31.2 |
26.0 |
10.3 |
19.1 |
1.7 |
43.8 |
81.0 |
62.4 |
1010.1 |
1014.7 |
1012.4 |
17.7 |
29.9 |
14.6 |
1.4 |
Min |
16.8 |
25.6 |
22.6 |
5.9 |
14.8 |
2.8 |
28.0 |
50.0 |
39.0 |
1001.3 |
1006.3 |
1003.8 |
9.2 |
22.0 |
10.0 |
|
Max |
25.0 |
36.7 |
29.3 |
16.1 |
22.6 |
0.1 |
79.0 |
96.0 |
73.5 |
1020.1 |
1023.5 |
1021.8 |
24.7 |
44.0 |
22.0 |
20.2 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
39.8 |
Season |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Average |
20.4 |
31.2 |
25.8 |
10.8 |
18.6 |
1.7 |
44.1 |
84.8 |
64.5 |
1011.4 |
1015.8 |
1013.6 |
17.9 |
28.4 |
14.3 |
1.7 |
Min |
14.9 |
23.9 |
21.2 |
1.1 |
13.0 |
2.8 |
13.0 |
50.0 |
39.0 |
1000.4 |
1006.3 |
1003.8 |
8.7 |
19.0 |
9.0 |
|
Max |
25.0 |
39.8 |
31.2 |
17.9 |
22.6 |
0.1 |
90.0 |
97.0 |
93.5 |
1020.1 |
1023.5 |
1021.8 |
24.7 |
48.0 |
25.0 |
36.0 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
131.1 |
Summary for summer 2018-19 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 (%) |
December |
|
|
|
|
|
|
|
|
Average |
+0.5 |
-5.8 |
+0.3 |
-7.8 |
-2.4 |
0.0 |
-63.4 |
55.8 |
Min |
+0.5 |
-7.1 |
|
-1.6 |
|
|
|
- |
Max |
+0.5 |
-4.6 |
|
-2.5 |
|
|
+37.8 |
- |
January |
|
|
|
|
|
|
|
|
Average |
+0.6 |
-9.5 |
+2.7 |
-1.6 |
-4.3 |
-7.3 |
-133.1 |
7.8 |
Min |
-0.0 |
-13.1 |
|
-2.5 |
|
|
|
|
Max |
+1.2 |
-5.9 |
|
-0.8 |
|
|
-40.2 |
|
February |
|
|
|
|
|
|
|
|
Average |
+0.9 |
-12.7 |
-1.6 |
-2.3 |
-1.8 |
-5.5 |
-122.0 |
24.6 |
Min |
+0.7 |
-13.5 |
|
-3.1 |
|
|
|
|
Max |
+1.1 |
-12.0 |
|
-1.5 |
|
|
-23.1 |
|
Season |
|
|
|
|
|
|
|
|
Average |
0.7 |
-9.3 |
0.5 |
-3.9 |
-2.8 |
-4.3 |
-318.5 |
29.4 |
Min |
0.4 |
-11.2 |
- |
-2.4 |
- |
- |
- |
- |
Max |
0.9 |
-7.5 |
- |
-1.6 |
- |
- |
- |
- |
Monthly averages and extremes for summer 2018-19 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 |
|
|
|
Dec-18 |
19.5 |
30.4 |
14.9 |
39.8 |
24.9 |
+0.5 |
+0.5 |
+0.5 |
80.1 |
-63.4 |
13 |
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 |
Season |
20.4 |
31.2 |
7.2 |
37.2 |
25.8 |
+0.4 |
+0.9 |
+0.7 |
130.3 |
-106.7 |
35 |
Data copyright Ferny Grove Weather 2019, Produced 16/8/2019. 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 effective October 5 this is the 24 hours from midnight. 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. This is same to the official time standards and measured in degrees C. Rainfall is measured over 24 hours to 9am and recorded on that day. This is the same as the official time standard and measured in millimetres. 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 a positive value when the grass temperature is below the air temperature.
Dew Point, Average Wind Speed, Dominant Wind Direction, Wind Run, Rain Rate and Hourly Rain are measured automatically 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 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. However the automatic record for some data 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 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.
The Fraction of monthly average expresses how much has fallen in respect to the long term average listed as a percentage.