In January mean night-time temperatures were close to average and daytime temperatures were above average. Rainfall was very low and the lowest on record. Mean relative humidity was below average and mean air pressure was well above average. There were no thunderstorms.
Mean minimum temperature: 20.8 ºC, equal to long term average and 1.7 ºC lower than same month in 2018
Mean maximum temperature: 32 ºC, 1.2 ºC above average and 0.9 ºC lower than same month in 2018
Mean temperature: 26.4 ºC, 0.6 ºC above average, 0.4 ºC higher than same month in 2018
Lowest temperature: 18.5 ºC at 5:11 AM on 18 January 2019 (the second highest monthly minimum temperature for January on record and the highest since 21 ºC at 5:11 AM on 18 January 2019 on 29 January 2010). Same month in 2018 was 13.8 ºC.
Highest temperature: 34.3 ºC at 1:17 PM on 19 January 2019. Same month in 2018 was 38 ºC.
Lowest maximum temperature: 28.9 ºC at 12:48 PM on 9 January. This month in 2018 was 29.8 ºC.
Highest minimum temperature: 22.9 ºC on 8 January 2019 at 6:44 AM. This month in 2018 was 29.8 ºC
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 C 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.
Maximum temperatures 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.
Mean minimum grass temperature: 19 ºC, 0.1 ºC higher than same month in 2018.
Lowest minimum grass temperature: 16.7 ºC on 18 January 2019 (0.8 ºC lower than same month in 2017).
Highest minimum grass temperature: 21.3 ºC on 8 January 2019 (2.1 ºC lower than same month in 2018).
Highest Minimum Grass Temperature Depression: 2.6 ºC on 13 January 2019 with a minimum grass temperature of 17.2 ºC and an air temperature of 19.8 ºC.
Lowest Minimum Grass Temperature Depression: 0.8 ºC on 4 January 2019 with a minimum grass temperature of 20.9 ºC and an air temperature of 21.7 ºC.
Mean minimum MSL pressure: 1013 hPa (3.7 hPa higher than same month in 2018). This is the second highest on record and the highest since the record high of 1015.4 hPa in 2010
Mean maximum MSL pressure: 1016.8 hPa (3.2 hPa higher than same month in 2018). This is the second highest on record and the highest since the record high of 1016.9 hPa in 2010.
Mean MSL pressure: 1014.9 hPa (2.7 hPa above average, 3.4 hPa higher than same month in 2018). This is the second highest on record and the highest since the current record high of 1016.1 hPa in 2010.
Lowest MSL pressure: 1010.1 hPa on 23 January 2019 at 4:44 PM. The same month in 2018 saw 1001 hPa. This is the highest monthly and daily minimum air pressure for January exceeding the previous record of 1006 hPa on 18 January 2010.
Highest MSL pressure: 1019.5 hPa on 20 January 2019 at 8:27 AM. The same month in 2018 saw 1019.6 hPa.
Mean minimum relative humidity: 42.5 % (6.9 % lower than same month in 2018 and 13.1% below average). This is the second lowest on record with the record low being 40.5 % in 2010.
Mean maximum relative humidity: 85.7 % (3.7 % lower than same month in 2018 and 5.9 % below average). This is second lowest on record and the lowest since the current record low of 82.9 % in 2010.
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 61.7 % in 2010.
Lowest relative humidity: 32% on 1 January 2019 at 1:48 PM and 28 January 2018 at 12:00 PM (5% lower than this month in 2018).
Highest relative humidity: 94% on 4 January 2019 at 6:10 AM (5% lower than this month in 2018). This is the lowest monthly January high humidity exceeding the previous record of 98% in 2017 on 28 January at 5:22 PM.
Monthly mean minimum dew point: 16.2 ºC (2.5 ºC below average)
Monthly mean maximum dew point: 20.5 ºC (0.8 ºC below average)
Monthly mean dew point: 18.3 ºC (1.6 ºC below average)
Lowest dew point: 8.7 ºC on 28 January 2019 at 11:49 AM
Highest dew point: 21.9 ºC on 9 January 2018 at 12:35 PM
Highest wind gust: 37 km/hr on 7 January 2019 at 12:45 PM. This is the second lowest January maximum wind gust and the lowest since 33.5 km/hr in 2012 on the 4 January at 5:40 PM. The maximum wind gust this month last year was 55.7 km/hr.
Highest wind speed: 19 km/hr on 26 January 2019 at 3:04 PM and 27 January 2019 at 3:16 PM (Light Force Wind).
Total wind run: 3, 613.4 km (2, 228.9 km more than same month in 2018) and is the highest on record for January total wind run exceeding the old record of 2,155.7 km in 2013.
Mean wind speed: 4.9 km/hr (3.0 km higher than this month last year). This is the highest on record for January exceeding the old record of 3 km/hr in 2013.
Daily Mean Maximum Wind Gust: 27 km/hr
Daily Mean Maximum Wind Speed: 14 km/hr
Dominant Direction: ENE (SSE this month last year).
Rainfall
Rainfall total: 1121.7 mm, 133.1 mm above average (7.8 % of long term average), 112.8 mm below the long term median and 8.9% of the site median. This is lower than this month last year which was 62.4 mm, and is the lowest on record. The old record was 16.5 mm in 2003. Automatic rain gauge was 8.4 mm (-23.6 % of manual gauge).
Highest daily rainfall total: 4.4 mm on 4 January 2019. This is the lowest January highest daily rainfall on record exceeding the old record low of 8 mm in 2003 on 5 January.
Number of rain days (0.1 mm or greater): 9 days, equal to this month last year and 1 day below average.
Highest rain fall rate: 48.6 mm/hr on the 7 January 2019 at 6:36 AM
Highest hourly rainfall total: 2.8 mm on the 4 January 2019 at 1:20 AM.
There were 0 thunderstorms, with 0 days with thunder, along with 0 nearby thunderstorms.
Rainfall at Ferny Grove consisted of light showers with low daily rainfall totals mostly in the first 10 days of the month. On the 4th there were some moderate falls. There were some showers on the 28th and 29th however.
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.
For more detailed analysis refer to the “Monthly Meteorological Report for January 2019”.
Summary of Averages and Extremes for January 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 |
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 |
77 |
59 |
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 |
94 |
74 |
1015.8 |
1019.5 |
1017.6 |
21.9 |
37.0 |
19.0 |
4.4 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
10.4 |
Summary for January 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 |
+0.6 |
-9.5 |
+2.7 |
-1.6 |
+10.1 |
-7.3 |
-133.1 |
7.8 |
Min |
-0.0 |
-13.1 |
|
-2.5 |
|
|
|
|
Max |
+1.2 |
-5.9 |
|
-0.8 |
|
|
-40.2 |
|
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 |
-133.9 |
9 |
YTD |
20.8 |
32.0 |
18.5 |
34.3 |
26.4 |
0.0 |
+1.2 |
+0.6 |
10.4 |
-133.9 |
9 |
Data copyright Ferny Grove Weather 2019, Produced 8/2/2019. 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 usually 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 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 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.