A typical January from my records;

  • An average temperature of 16.8C
    • Maximum temperature expected about 33C.
    • Minimum temperature expected about 6C.
    • No days fail to reach 10C.
    • Twenty nine days are expected to reach or exceed 15C
    • Twenty two days are expected to reach or exceed 20C.
    • Ten days reach or exceed 25C.
    • Three days reach or exceed 30C.
    • Four January days have reached or exceeded 35C in the past 19 years. January 2018 reached or exceed 35C on 2 days so accounted for half that total. On the 20th with 35.2C and 24th with 35.3C.
  • Wind run would be around 5630km with the windiest day expected to have a wind run of 330km.
    • Maximum wind gust would be in the region of 60km/h.
  • There would be rain on 8 days with the monthly total of around 43mm.

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

January 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 15.3 25.3 18.6 5.3 27 121 East Nth East 0.8 1.8 1005.3 1016.2 -10.9
Early showers and morning drizzle clearing by midday with sunny intervals in the afternoon.
2 14.6 34.1 24.8 6.3 38 145 North Nth West 0 0 999.0 1005.3 -6.3
Variable high cloud but mostly sunny and very warm in the afternoon. North to NW winds.
3 13.1 33.9 20.9 5.4 40 123 East Nth East 0 0 999.3 1008.1 +8.8
Sunny and very warm until a cooling southerly change in the afternoon arrived with increasing cloud. A few spots of drizzle in the evening.
4 12.8 28.1 18.5 7.1 34 162 East Nth East 0 0 1007.1 1017.6 +10.5
Light variable winds in the morning turning cooler NE in the afternoon, some cloud but mostly sunny.
5 15.3 28.3 21.8 9.7 37 222 East Nth East 0 0 1003.8 1017.1 -13.3
Sunny and very warm with nor'east winds turning nor'west in the evening with increasing high cloud.
6 14.0 27.6 20.8 10.3 39 233 West 0.8 3.0 1001.6 1010.2 +8.6
Warm morning, maximum temperature recorded at 8am. A cooler southerly change arriving just after 8am with cloud increasing in the afternoon and a period of rain in the evening. Near record warm overnight temperature recorded according to this Stuff article Canterbury sweats through one of its hottest nights on record.
7 13.4 21.8 17.2 8.7 33 198 East Nth East 0.4 2.8 1010.4 1014.7 +4.3
Morning drizzle clearing by midday to a sunny afternoon with NE winds.
8 12.5 26.6 18.2 7.6 36 173 East Nth East 0 0 1013.8 1021.9 +8.1
Cloud breaking to s mostly sunny afternoon. Warm with southerly winds turning NE from mid afternoon.
9 16.0 29.6 20.8 12.3 41 282 East Nth East 0 0 1005.5 1021.5 -16.0
Hazy with variable cloud and a fresh NE wind easing in the afternoon and turning warm nor'west.
10 15.3 33.5 22.1 7.3 34 168 South Sth West 0.2 0.2 1003.6 1009.0 +5.4
Morning showers clearing to a sunny and very warm morning with the maximum temperature recorded at 11:30am. Southerly winds from midday but remaining fine.
11 12.3 22.6 16.1 5.4 26 123 South Sth West 0.4 4.2 1009.3 1025.7 +16.4
Morning fog clearing with broken cloud with westerly winds turning southerly in the morning. Afternoon shower with light rain and drizzle in the evening.
12 11.7 18.6 14.9 6.3 32 142 East Nth East 0.4 2.8 1020.6 1028.6 -8.0
Morning light rain and drizzle clearing by midday but remaining overcast with NE a wind.
13 13.6 30.2 19.5 8.1 34 185 East Nth East 1.8 4.4 998.1 1020.4 -22.3
Broken cloud in the morning with NE winds, a brief change to warm northerly winds around 1 pm pushed the temperature up to 30,2C. Cloud increasing in the afternoon with a few spots of rain and further showers later in the evening.
14 10.4 18.0 12.8 13.4 41 307 South Sth West 2.4 33.6 1003.1 1015.4 +12.3
Morning rain with fresh westerly winds turning southerly. Rain easing by late morning and clearing in the afternoon with cloud breaking. Cloud returning in the evening but remaining dry.
15 12.2 20.8 15.1 6.3 25 144 South Sth West 0 0 1014.8 1019.0 +4.2
Morning cloud breaking in the afternoon with increasing sunny spells, light southerly winds.
16 9.1 20.8 15.7 7.6 37 175 East Nth East 0 0 1008.3 1019.0 -10.7
Mostly clear and sunny with some high cloud in the afternoon. NE wind.
17 14.2 23.4 18.2 8.1 30 185 East Nth East 0 0 1003.8 1008.3 -4.5
Variable cloud but mostly sunny, NE wind.
18 15.5 22.4 18.3 6.1 24 138 West 0 0 1007.7 1013.0 +5.3
Mostly cloudy but sunny intervals in the afternoon, westerly winds turning southerly in the afternoon and to NE in the evening.
19 15.6 32.0 21.8 9.4 50 215 East Nth East 0 0 989.5 1011.5 -22.2
Variable high cloud with sunny intervals. NE winds with a change to very warm nor'west from mid afternoon.
20 11.0 30.0 20.5 6.5 34 149 North Nth West 0 0 990.3 1000.8 +10.5
Some high cloud but mostly sunny and warm with variable winds tending warm northerly from midday.
21 13.2 27.3 18.9 4.5 27 102 East Nth East 0 0 993.4 1006.0 +12.6
Variable high cloud with sunny intervals and mostly light north to NE winds.
22 12.9 32.3 21.9 7.5 38 171 East Nth East 0 0 998.9 1006.8 -7.9
Morning cloud clearing by midday. NE winds turning warm north to nor'west from mid afternoon.
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