A typical August based on the past 10 years of my records (2009 to 2018);

  • An average temperature of 8.0C
    • Maximum temperature expected about 21C.
    • Minimum temperature expected about -2.0C.
    • There are 5 frosts on average, air temperature at or below 0C.
    • Six days fail to reach 10C.
    • Eight days are expected to reach or exceed 15C
    • One day on average are expected to reach or exceed 20C.
  • Wind run would be around 4000km with the windiest day expected to have a wind run of 300km.
    • Maximum wind gust would be in the region of 55km/h.
  • There would be rain on 12 days with the monthly total of around 60mm.
    • Maximum daily rainfall is expected to be around 22mm

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

August 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 -0.3 10.0 5.9 11.4 44 261 South West 0.6 3.0 1001.3 1004.0 -2.7
Early showers clearing by dawn and cloud breaking with sunny intervals in the afternoon. Cold southerly winds.
2 -0.7 13.2 6.5 7.6 53 173 East Ntn East 0.6 3.8 988.5 1000.8 -12.3
Cloud breaking around midday but increasing later in the afternoon with a southerly change in the evening strengthening with showers.
3 3.2 12.3 8.1 8.8 52 203 South West 0.2 0.6 990.9 1004.5 -13.6
Showers clearing before dawn and the southerly dying away. A mostly sunny day with cool NE winds in the afternoon.
Big seas pound the west, snow expected to near sea level
4 0.0 9.7 4.9 3.7 39 84 South Sth West 0.8 2.2 990.4 996.6 +6.2
Early showers clearing by dawn. Overcast and cool with light NE winds. Sunny intervals in the afternoon, cloud returning in the evening with showers. Maximum temperature recorded at 1:20am.
Climate scientist: It's cold now, but NZ region just saw its warmest July
Snow hits Canterbury, continues to fall in the south
5 -3.9 10.7 2.3 3.4 34 77 South Sth West 0 0 995.8 1006.8 +11.0
Coldest morning of the year to date. Sunny though some afternoon cloud, cold southerly winds.
Lake Tekapo has its warmest ever July
6 -3.5 13.7 3.3 1.1 15 24 East Nth East 0 0 1006.7 1010.8 +4.1
Morning frost, clear and sunny, feeling mild in the afternoon. Light NE breezes.
7 -1.5 16.3 5.5 1.0 15 23 East Nth East 0 0 1004.8 1009.5 -4.7
Some high cloud but mostly sunny and mild in the afternoon. Light breezes tending NE.
8 -1.1 14.6 6.1 1.7 18 38 East Nth East 0 0 994.9 1006.5 -11.6
Some high cloud but mostly sunny and feeling mild in the afternoon.
Water shortage: Auckland needs twice as much rain to top up dams
9 3.7 14.5 9.2 3.9 28 87 East Nth East 0 0 991.7 997.0 +5.3
Sunny morning, Cloud increasing in the afternoon with a cool NE wind.
10 4.9 8.4 6.6 8.4 44 191 East 1.2 11.8 989.0 997.2 -8.2
Overcast with showers, some heavy. Easterly winds turning cooler southerly from late afternoon.
Heavy snow fall forces road closures in South Island amid wild weekend weather for New Zealand
11 3.4 10.0 6.0 6.2 26 141 West 0.2 0.4 987.8 991.8 -4.0
Overcast with morning drizzle, some sunny intervals in the afternoon. Variable winds tending westerly.
12 2.2 9.7 5.8 3.6 22 81 South Sth West 0.2 0.2 987.6 991.8 +4.2
Early showers clearing before dawn, morning cloud breaking to a sunny afternoon with cool southerly winds.
Wild weather - Fire Service called to dozens of homes, including one struck by lightning
Tornados, torrential rain, hail, thunderstorms smash North Taranaki
Fast winds high in atmosphere key to thousands of lightning strikes over North Island
13 0.3 15.3 6.8 5,6 43 128 East Nth East 0 0 987.1 998.3 +11.2
Morning cloud clearing to a sunny afternoon with northerly winds. Cool southerly change in the evening.
'Tornado' hits Auckland waterfront and leaves destruction in its wake
Chaotic weather system behind weirdly-shaped hail
14 1.4 10.2 6.5 7.3 37 167 South Sth West 0 0 998.5 1016.7 +18.2
Some cloud but mostly sunny with cool a southerly wind.
15 -2.5 11.9 4.9 3.7 20 84 East Nth East 0 0 1011.9 1016.8 -4.9
Sunny though high cloud increasing in the afternoon, cool NE wind.
16 5.1 15.2 9.4 3.9 34 87 East Nth East 0 0 997.3 1011.5 -14.2
Cloudy with some sunny intervals after midday and milder northerly winds.
Unsettled, cold August weather may blast into September too
17 1.3 10.5 6.2 8.4 44 191 South Sth West 0.6 8.8 996.8 1023.1 +26.3
Morning rain clearing by midday with some sunny intervals in the afternoon. Showers returning in the evening. Cold southerly wind.
Carnage after 'tornado' rips through Awakino River baches in Taranaki
18 -0.1 10.7 4.2 2.2 22 50 South Sth West 0.2 1.0 1023.3 1030.1 +6.8
Few morning showers clearing by midday then mostly sunny. Southerly breezes turning NE from later afternoon.
19 2.2 10.2 6.6 9.2 31 210 East Nth East 0 0 1010.8 1028.0 -17.2
Sunny with thin high cloud, cool NE wind.
20 1.0 13.4 8.5 6.1 34 140 East Nth East 0 0 991.2 1010.8 -19.6
Overcast and cool with NE winds.
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