Overnight and daytime temperatures were above average at Ferny Grove but close to average. Rainfall was below average at Ferny Grove but ranks historically as average. Mean relative humidity was below average and mean air pressure was close to average. There were 3 thunderstorms (2 thunder days).
Mean minimum temperature: 19.5 ºC, 0.5 ºC above average and 0.7 ºC higher than same month in 2017.
Mean maximum temperature: 30.4 ºC, 0.5 ºC above average and 1.3 ºC lower than same month in 2017.
Mean temperature: 24.9 ºC, equal to long term average and 0.3 ºC lower than same month in 2017.
Lowest temperature: 4.9 ºC at 4:56 AM on 26 December 2018. Same month in 2017 was 13.8 ºC. This is the second lowest monthly minimum temperature for December and the highest since the current record low of 16.6 ºC on 3 December 2009.
Highest temperature: 39.8 ºC at 2:47 PM on 21 December 2018. Same month in 2017 was 36.5 ºC. This is the highest monthly and daily maximum temperature for December, exceeding the old record of 38.5 C on 4 December 2012 at 3:10 PM.
Lowest maximum temperature: 23.9 ºC at 9:00 AM on 16 December 2018. This is the lowest monthly December lowest maximum temperature since 18.9 ºC in 2011 on 7 December at 4:36 PM. This month in 2017 was 27.1 ºC.
Highest minimum temperature: 23.3 ºC at 2:00 AM on 3 December 2018. This month in 2017 was 24 ºC.
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.
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.
Mean minimum grass temperature: 17.8 ºC (0.1 ºC higher than same month in 2017)
Lowest Minimum Grass Temperature: 13 ºC on 25 and 26 December 2018 (0.8 ºC lower than same month in 2017). This was with a minimum temperature of 15.2 C on 25 December and the lowest minimum temperature for the month on 26 December of 14.9 C.
Highest Minimum Grass Temperature: 21.9 ºC on 16 December 2018 (2.1 ºC lower than same month in 2017). This was with a minimum air temperature of 22.8 ºC for the month.
Mean minimum MSL pressure: 1011.1 hPa (0.9 hPa higher than same month in 2017).
Mean maximum MSL pressure: 1011.1 hPa (0.9 hPa higher than same month in 2017).
Mean MSL pressure: 1013.6 hPa (0.3 hPa above average, 1.3 hPa higher than same month in 2017).
Lowest MSL pressure: 1000.4 hPa on 2 December 2018 at 3:58 PM. The same month in 2017 saw 1000.4 hPa. This is the lowest monthly air pressure for December since 999.3 hPa on 5 December 2013 at 3:40 PM.
Highest MSL pressure: 1021.8 hPa on 7 December 2018 at 11:19 AM. The same month in 2017 saw 1019.5 hPa.
Mean minimum relative humidity: 46 % (5.1 % lower than same month in 2017 and 7.1% below average). This is the second lowest on record whilst the record low is 38.7 % in 2009.
Mean maximum relative humidity: 87.8 % (4.3 % lower than same month in 2017 and 4.6 % below average). This is second lowest on record and the lowest since the current record of 86 % in 2009.
Mean relative humidity: 66.9 % (4.7 % lower than same month in 2017 and 5.8 % below average). This is the second lowest on record and the lowest since the current record low of 62.3 % in 2009.
Lowest relative humidity: 13% on 1 December 2018 at 12:23 PM (13% lower than this month in 2017). This is the second lowest minimum daily and monthly humidity on record for December and the lowest since the current record low of 10 % on 5 December 2012 at 5:15 PM.
Highest relative humidity: 97% on 16, 17 and 18 December 2018 at 12:23 AM on the 18 December (2% lower than this month in 2017).
Monthly mean minimum dew point: 15.3 ºC (1.7 ºC below average)
Monthly mean maximum dew point: 20 ºC (0.3 ºC above average)
Monthly mean dew point: 17.7 ºC (0.9 ºC below average)
Lowest dew point: 2.7 ºC on 1 December 2018 at 12:35 PM
Highest dew point: 24.5 ºC on 21 December 2018 at 4:15 PM
Highest 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
Highest wind speed: 25 km/hr on 2 December 2018 at 12:19 PM (Moderate Force Wind).
Total wind run: 4054 km (2796.7 km more than same month in 2017) and is the highest on record for December on record beating the old record of 1682.6 km in 2012.
Mean wind speed: 5.5 km/hr (3.8 km higher than this month last year). This is the highest on record for December exceeding the old record of 2.3 km/hr in 2012 and 2015.
Daily Mean Maximum Wind Speed: 15 km/hr
Dominant Direction: E (SW this month last year).
Rainfall total: 80.1 mm, 63.4 mm below average (55.8 % of long term average), 8.4 mm below the long term median and 88.3% of the site median. This is lower than this month last year which was 88.9 mm. Automatic rain gauge was 62.2 mm (-22.3 % of manual gauge).
Highest daily rainfall total: 36 mm on 17 December 2018. This is the highest for December since 64.5 mm on the 12 December 2010
Number of rain days: 13 days, 3 lower than this month last year and 2.8 days above average. This is the lowest for December since 10 days in 2013.
Highest rain fall rate: 27.2 mm on the 17 December 2018.
Highest hourly rainfall total: 36.6 mm on 16 December 2018.
There were 3 thunderstorms, with 2 days with thunder, along with 2 nearby thunderstorms.
There were several days of showers with low rainfall totals in the first half of the month. In the middle of the month were showers and rain with moderate falls along with thunderstorms before some light showers in the third week of the month.
A gusty S to SW wind change in late afternoon of the 22nd after hot days on the 21st and 22nd.
For December there were 4 existing records exceeded, along with 7 records that was highest/lowest in at least 5 years.
For more detailed analysis refer to the “Monthly Meteorological Report for December 2018”.
Summary of Averages and Extremes for December 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 |
19.5 |
30.4 |
46.0 |
87.8 |
1011.1 |
1016.1 |
28.7 |
14.7 |
2.6 |
24.9 |
10.9 |
17.8 |
-1.6 |
Min |
14.9 |
23.9 |
13.0 |
73.0 |
1000.4 |
1008.6 |
19.0 |
9.0 |
|
21.2 |
1.1 |
13.0 |
-2.5 |
Max |
23.3 |
39.8 |
90.0 |
97.0 |
1019.4 |
1021.8 |
48.0 |
25.0 |
36.0 |
31.2 |
17.9 |
21.9 |
-0.5 |
Total |
|
|
|
|
|
|
|
|
80.1 |
|
|
|
|
Summary for December 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 |
+0.5 |
-5.8 |
+0.3 |
-63.4 |
55.8 |
143.5 |
38.8 |
Min |
+0.5 |
-7.1 |
|
|
|
- |
- |
Max |
+0.5 |
-4.6 |
|
+37.8 |
|
- |
- |
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 |
40.2 |
-76.6 |
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 |
Oct-18 |
15.4 |
26.6 |
9.1 |
34.6 |
21.0 |
+1.1 |
-0.9 |
+0.1 |
263.7 |
+189.6 |
20 |
Nov-18 |
17.4 |
30.5 |
12.6 |
37.2 |
23.9 |
-0.5 |
+0.6 |
+0.0 |
21.6 |
-64.8 |
7 |
Dec-18 |
19.5 |
30.4 |
14.9 |
39.8 |
24.9 |
+0.5 |
+0.5 |
+0.5 |
80.1 |
-63.4 |
13 |
YTD |
14.4 |
27.4 |
1.8 |
39.8 |
20.9 |
-0.6 |
+0.9 |
+0.1 |
1112.7 |
+1.7 |
136 |
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 on 13/10/19 based on data complied on 25/12/18. 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 in this summary. Data measured with professional moderate accuracy equipment except for daily rainfall and grass minimum temperature 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 from 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 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.
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. The automatic record is used 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”.