December 2018

December Summary

Above average temperature and rainfall, less windy.

  • December was above my average temperature of 15.6C with 16.3C, the warmest December was 2017 with 18.3C, the coldest was 2003 with 12.7C.
    • The warmest temperature was 32.4C, my December record is 35.6C set in 2017
    • The coldest temperature was 5.9C, the lowest December temperature I've recorded is 1.3C in 2006.
    • No days failed to reach 10C, my average is 0.
    • Thirty one days reached or exceeded 15C, my average is 29.
    • Twenty one days reached or exceeded 20C, my average is 18.
    • Five days reached or exceeded 25C, my average is 8.
    • Two days reached or exceeded 30C. my average is 2.
  • Wind run was 85% of my average of 5727km with 4859km and is the second least windy December I've recorded, the least windy December I've recorded was 2013 with 4554km.
    • The windiest December was 2004 with 6940km.
  • The barometer recorded near average pressure for the month with 1011.4hPa. My average is 1011.5hPa.
  • Rainfall was 114% of the average expected total of 55mm with 63.5mm.
    • The wettest December in my records was 2004 with 138mm.
    • The driest December I've recorded is 2003 with just 2mm.
December 2018 Summary
Temperature
Mean 16.3 C
Mean Maximum 21.5 C
Mean Minimum 12.3 C
Maximum High 32.4 C (29th)
Maximum Low 16.6 C (30th)
Minimum High 15.6 C (19th)
Minimum Low 5.9 C (7th)
Wind Speed and Direction
Maximum Gust 46 km/h (6th)
Mean 6.9 km/h
Wind Run 4859 km
Max Daily Windrun 305 km (1st)
Prevailing Direction East North East
Barometer
Maximum 1028.0 hPa (16th)
Minimum 984.6 hPa (4th)
Mean 1011.4 hPa
Max Daily Change +19.0 hPa (5th)
Rainfall
Days with Measured Rainfall
(0.5mm or more)		 15
Max Daily Rainfall 20.5 mm (19th)
Monthly Rainfall 63.5 mm
Humidity
Maximum 100 % (Several days)
Minimum 26 % (4th)

 

December Daily Observations
TemperatureWindRainfallBarometer
DateMinMaxMeanMean
(Km/h)		Gust
(Km/h)		Run (km)Prevailing Dir10 Minute Max (mm)Total (mm)Min (hPa)Max (hPa)Change (hPa)
1 14.1 20.0 16.2 13.4 45 305 East Nth East 0.5 0.5 1007.7 1013.1 -5.4
Cloudy morning with some light rain and drizzle, sunny intervals in the afternoon, fresh east to NE winds.
2 14.5 17.9 15.7 10.6 33 240 East Nth East 0.5 0.5 1003.8 1008.9 -5.1
Overcast with low cloud and drizzle at times, NE winds.
3 14.1 19.0 15.7 11.3 35 259 East Nth East 0.5 0.5 992.9 1003.8 -10.9
Overcast with low cloud, drizzle and light rain at times.
4 13.2 29.4 19.5 8.6 42 196 East Nth East 0 0 984.6 992.6 -8.0
Morning fog clearing to a mostly sunny and warm day with north to nor'west winds from midday. A few light showers in the evening.
5 11.3 23.0 15.2 7.4 45 167 South Sth West 1.0 9.0 985.2 1004.2 +19.0
Morning showers clearing but remaining mostly cloudy. Cool southerly change in the afternoon with showers turning to evening rain.
6 7.7 17.1 12.7 10.1 46 230 South Sth West 0.5 0.5 1004.5 1021.2 +16.7
Early showers clearing by dawn. Variable cloud with a mostly sunny afternoon. Fresh southerly winds.
7 5.9 20.5 14.4 6.5 29 150 East Nth East 0 0 1018.4 1022.2 -3.8
Variable high cloud but mostly sunny with a NE wind from midday.
8 10.9 22.4 16.4 5.2 27 119 East Nth East 0 0 1014.1 1022.1 -8.0
mostly overcast with high cloud but some sunny intervals, east to NE winds.
9 12.0 27.8 20.0 3.1 22 71 East Nth East 0 0 1010.8 1016.6 -5.8
High cloud increasing during the morning with the remainder of the day overcast and warm with light NE winds.
10 12.8 18.2 14.5 8.4 32 193 South Sth West 0 0 1013.6 1019.6 +6.0
Mostly cloudy but some brighter intervals around noon. Southerly winds turning NE from mid afternoon with increasing low cloud.
11 12.6 16.6 13.7 9.3 32 209 East Nth East 0.5 2.5 1011.4 1017.2 -5.8
Overcast with a few spots of rain at times. Showers from evening. NE winds.
12 12.9 19.4 15.2 5.7 26 130 East Nth East 0.5 4.0 1010.7 1015.8 +5.1
Morning rain and drizzle clearing by afternoon but remaining overcast with NE winds.
13 13.3 20.3 15.9 4.2 24 97 East Nth East 0.5 1.0 1015.8 1019.5 +3.7
Overcast but mild, light southerly winds turning NE later in the afternoon, light rain and drizzle in the evening.
14 14.2 20.7 16.6 7.1 24 161 East Nth East 0 0 1018.4 1021.3 +2.9
Mostly cloudy with a few sunny intervals and the odd spot of rain.
15 14.3 23.5 17.2 5.3 25 122 East Nth East 0 0 1020.7 1026.4 +5.7
Mostly sunny with variable winds turning NE later in the afternoon with increasing cloud.
16 14.1 21.2 17.0 5.3 32 120 East Nth East 0 0 1024.5 1028.0 -3.6
Overcast with east to NE winds.
17 14.2 25.7 19.7 7.7 31 176 East Nth East 0 0 1012.2 1024.4 -12.2
Sunny with some high cloud later in the afternoon, NE wind.
18 15.3 23.0 19.7 6.9 38 158 North Nth West 0 0 1000.2 1011.9 -11.7
Overcast with high cloud, mild northerly winds.
19 10.1 15.6 13.2 4.6 27 105 South West 1.5 20.5 1002.8 1008.7 +5.9
Overcast with rain, some heavy falls, southerly winds turning northerly from mid afternoon. Maximum temperature recorded at midnight, min at 10:30pm.
20 9.8 15.6 12.0 1.5 17 34 East Nth East 0.5 4.5 1002.3 1008.1 -5.8
Overcast with light rain at times, light variable breezes tending NE.
21 7.1 19.7 13.0 4.0 26 91 East Nth East 0.5 4.5 996.1 1002.1 -6.0
Variable cloud with NE winds, cloud increasing with rain from evening.
22 9.6 21.4 14.3 3.9 30 89 East Nth East 1.5 12.0 999.9 1009.7 +9.8
Sunny and mild morning with a light nor'easterly. cloud increasing from mid afternoon with showers and a couple of rumbles of thunder. Light southerly winds in the evening.
23 10.3 19.8 13.9 6.1 21 141 East Nth East 0.5 0.5 1009.8 1018.5 +8.7
Any showers clearing by dawn. Cloud increasing in the morning but breaking in the afternoon. Southerly winds turning NE late morning.
24 9.2 20.7 15.7 10.6 37 243 East Nth East 0 0 1016.9 1019.2 -2.3
Sunny with a fresh NE wind, cloud increasing later in the afternoon.
25 15.6 21.6 17.4 8.1 28 184 East nth East 0 0 1001.6 1017.3 -15.7
Overcast with a few spots of drizzle late morning. A few sunny intervals in the afternoon, NE winds.
26 12.0 20.6 15.6 7.3 29 165 South Sth West 0.6 1.0 1002.2 1014.3 +12.1
Overcast but a few sunny intervals in the afternoon. Cloud increasing from late afternoon with showers in the evening.
27 10.6 21.2 16.0 5.9 21 117 East Nth East 0 0 1013.0 1019.7 +6.7
Variable morning cloud but mostly sunny with NE wind. Cloud increasing from late afternoon with a few spots of rain at night.
28 13.8 20.9 16.9 10.3 43 235 East Nth East 0 0 1017.5 1021.4 -3.9
Broken cloud, fresh NE wind.
29 13.5 32.4 20.5 5.3 31 122 East Nth East 0 0 1013.7 1018.2 -4.5
Cloudy morning with a few spots of rain. Very warm and sunny in the afternoon with light variable breezes, a cooler NE wind from mid afternoon.
30 16.6 30.3 22.5 2.7 24 61 East Nth East 0 0 1008.4 1013.5 -5.1
Overcast with thick high cloud, light winds turning southerly in the evening.
31 14.3 21.9 18.3 6.8 33 155 East Nth East 0.6 2.0 1011.3 1016.2 +4.9
Some broken morning cloud but mostly sunny with NE winds. Cloud increasing on the evening with a period of rain.

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December 2018 Temperature Graph
December 2018 Wind Dir Graph
December 2018 Wind Dir Graph
December 2018 Wind Speed Graph
December 2018 Rainfall Graph
December 2018 Barograph
December 2018 Humidity Graph