A typical December from my records; 

    • An average temperature of 15.6C
    • Maximum temperature expected about 31C.
    • Minimum temperature expected about 5C.
    • No days fail to reach 10C.
    • Twenty nine days are expected to reach or exceed 15C
    • Eighteen days are expected to reach or exceed 20C.
    • Eight days reach or exceed 25C.
    • Two days reach or exceed 30C
  • Wind run would be around 5790km with the windiest day expected to have a wind run of 330km.
    • Maximum wind gust would be in the region of 55km/h.
  • There would be rain on 9 days with the monthly total of around 55mm.

Rain totals for the month and year along with temperature and wind comparisons can be found here.

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.
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