August Summary
Close to average temperature, the windiest August since 2013, 136% of expected rainfall making it the wettest August since 2012 but 2021 is still below expected yearly average.
(August compared to my records from the past 10 years.)
- This August was just above my average temperature of 7.8c with 8.0C.
- The coldest temperature was -2.2C which is about the expected minimum for August.
- The highest temperature was 21.2C, my average August maximum is 20.9C.
- Five air frosts (air temperature at or below 0) were recorded, my average is 6.
- Four days failed to reach or exceed 10C, my average is 5.
- Six days reached or exceeded 15C, my average is 8.
- Three days reached or exceeded 20C, my average is 1.
- Wind run was 109% of my average of 3825km with 4185km, the windiest August since 2013 with 4210km.
- The barometer recorded above average pressure for the month with 1012.6hPa. My average is 1011.6hPa.
- Rainfall was 136% of the average expected total of 46mm with 62.6mm.
- The wettest August in the past 10 years is 2012 with 118mm and in all my records 2004 with 172.4mm.
August 2021 Summary Temperature | |
---|---|
Mean | 8.0 C |
Mean Maximum | 12.9 C |
Mean Minimum | 3.3 C |
Maximum High | 21.2 C (23rd) |
Maximum Low | 9.7 C (1st) |
Minimum High | 4.3 C (9th) |
Minimum Low | -2.2 C (15th) |
Wind Speed and Direction | |
Maximum Gust | 62 km/h (3rd) |
Mean | 5.9 km/h |
Wind Run | 4185 km |
Max Daily Windrun | 393 km (3rd) |
Prevailing Direction | East North East |
Barometer | |
Maximum | 1034.3 hPa (31st) |
Minimum | 986.3 hPa (17th) |
Mean | 1012.6 hPa |
Max Daily Change | +24.1 hPa (20th) |
Rainfall | |
Days with Measured Rainfall (0.2mm or more) |
15 |
Max Daily Rainfall | 28.8 mm (3rd) |
Monthly Rainfall | 62.6 mm |
Humidity | |
Maximum | 99 % |
Minimum | 39 % (25th) |
August Daily Observations | ||||||||||||
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Temperature | Wind | Rainfall | Barometer | |||||||||
Date | Min | Max | Mean | Mean (Km/h) | Gust (Km/h) | Run (km) | Prevailing Dir | 10 Minute Max (mm) | Total (mm) | Min (hPa) | Max (hPa) | Change (hPa) |
1 | 9.7 | 12.5 | 10.6 | 10.4 | 34 | 236 | East Nth East | 0 | 0 | 1007.4 | 1013.0 | -5.6 |
Low cloud with some sunny intervals in the afternoon, NE wind. | ||||||||||||
2 | 8.5 | 11.9 | 10.3 | 9.8 | 35 | 225 | East Nth East | 0.4 | 0.6 | 995.9 | 1007.3 | -11.4 |
Low cloud with some sunny intervals in the afternoon, showers at night. Cool NE wind. | ||||||||||||
3 | 4.9 | 8.6 | 7.2 | 17.2 | 62 | 393 | South Sth West | 1.0 | 26.8 | 997.3 | 1017.0 | +17.7 |
Overcast with rain easing from midday and clearing in the afternoon. Fresh to strong cold southerly wind. | ||||||||||||
4 | -0.3 | 10.2 | 5.5 | 5.1 | 29 | 114 | East Nth East | 0.2 | 0.2 | 1004.1 | 1015.4 | -11.3 |
Light morning frost. Sunny with light breezes. High cloud increasing later in the afternoon with a cool NE wind. | ||||||||||||
5 | 5.2 | 10.9 | 8.4 | 10.3 | 44 | 235 | East Nth East | 0.2 | 0.4 | 990.6 | 1003.7 | -13.1 |
Light rain in the morning clearing by midday with sunny intervals in the afternoon. Cool NE wind. Where's winter? NZ on track for another record warm season |
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6 | 4.8 | 8.4 | 7.0 | 5.9 | 24 | 134 | South West | 0.4 | 6.8 | 989.6 | 993.2 | +3.6 |
Overcast with light rain in the morning and drizzle in the afternoon. Light southerly winds. | ||||||||||||
7 | 1.0 | 12.9 | 6.2 | 2.9 | 40 | 66 | South Sth West | 0.2 | 0.2 | 991.4 | 1002.6 | +11.2 |
Early cloud breaking later in the morning with wind easing to a breeze making a pleasant afternoon. | ||||||||||||
8 | 2.4 | 5.0 | 4.0 | 3.8 | 34 | 86 | South Sth West | 0.4 | 11.0 | 1001.1 | 1010.0 | +8.9 |
Overcast and cold with rain easing to showers in the afternoon. Snow in areas around Christchurch but only 1 hail shower observed in the afternoon with temperature mostly around 3 to 4C during the day. | ||||||||||||
9 | 0.9 | 4.3 | 2.7 | 8.5 | 43 | 195 | South Sth West | 1.0 | 6.4 | 1010.2 | 1015.6 | +5.4 |
Cold with showers, sleet and snow flurries. Southerly winds. South Island highways reopen after 'hundreds' stranded by snowy conditions Snow brings traffic to a stop on busy highway in North Canterbury |
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10 | 0.9 | 14.7 | 6.7 | 1.2 | 16 | 28 | North Nth West | 0 | 0 | 1015.3 | 1020.3 | +5.0 |
Clear and sunny with light breezes tending northerly. | ||||||||||||
11 | 2.1 | 13.9 | 8.5 | 5.0 | 30 | 114 | East Nth East | 0 | 0 | 1020.9 | 1027.4 | +6.5 |
Clear and sunny with a cool NE wind in the afternoon. | ||||||||||||
12 | 4.3 | 13.4 | 10.2 | 6.9 | 40 | 156 | East Nth East | 0 | 0 | 1003.0 | 1024.3 | -21.3 |
Overcast with high cloud, NE winds turning northerly in the evening. | ||||||||||||
13 | 5.3 | 12.5 | 8.7 | 4.1 | 30 | 94 | West Nth West | 0.2 | 0.6 | 1002.3 | 1012.1 | +9.8 |
Light rain clearing in the afternoon with cloud breaking. Variable breezes turning NE at night. | ||||||||||||
14 | 0.4 | 13.4 | 6.0 | 5.1 | 56 | 116 | East Nth East | 0.4 | 2.6 | 1000.3 | 1013.2 | +12.9 |
Morning cloud increasing with a strong southerly change about 11am with some rain. Cloud clearing in the afternoon and wind dying away. | ||||||||||||
15 | -2.2 | 14.3 | 5.6 | 2.1 | 18 | 48 | East Nth East | 0 | 0 | 1013.1 | 1017.4 | -4.3 |
Morning frost, mostly sunny with some high cloud at times, light winds tending NE. | ||||||||||||
16 | 1.5 | 17.0 | 9.5 | 6.1 | 40 | 140 | East Ntn East | 0 | 0 | 990.3 | 1013.6 | -23.3 |
Mostly sunny with some high cloud, winds tending milder northerly in the afternoon. | ||||||||||||
17 | 5.8 | 14.7 | 9.8 | 7.5 | 34 | 171 | North Nth East | 0 | 0 | 986.3 | 992.6 | +6.3 |
Cloud breaking in the afternoon with sunny intervals, winds tending northerly | ||||||||||||
18 | 3.2 | 11.1 | 6.6 | 5.3 | 29 | 120 | South Sth West | 0.4 | 1.2 | 993.0 | 1010.2 | +17.2 |
Morning showers clearing and cloud breaking to a sunny though cool afternoon with southerly winds dying away. | ||||||||||||
19 | -0.7 | 17.0 | 7.6 | 3.6 | 33 | 81 | East Nth East | 0 | 0 | 1006.3 | 1010.5 | -4.2 |
Sunny and mild in the afternoon with northerly winds. | ||||||||||||
20 | 0.0 | 10.2 | 5.7 | 7.6 | 44 | 173 | South Sth West | 0.2 | 0.8 | 1008.2 | 1032.3 | +24.1 |
Morning showers clearing to a sunny though cool afternoon. Southerly wind.dying out in the evening. | ||||||||||||
21 | -0.7 | 10.6 | 5.7 | 9.0 | 40 | 205 | East Nth East | 0 | 0 | 1025.7 | 1032.8 | -7.1 |
Sunny with a fresh cool NE wind. | ||||||||||||
22 | 3.3 | 14.4 | 9.5 | 4.5 | 27 | 103 | East Nth East | 0 | 0 | 1020.9 | 1025.5 | -4.6 |
Overcast with high cloud, light winds. | ||||||||||||
23 | 3.9 | 21.2 | 11.4 | 3.0 | 26 | 68 | East Nth East | 0 | 0 | 1024.2 | 1027.0 | +2.8 |
Sunny and mild from late morning with some high cloud at times, light winds tending NE. | ||||||||||||
24 | 4.6 | 20.7 | 11.8 | 4.1 | 35 | 93 | East Nth East | 0 | 0 | 1023.4 | 1026.3 | -2.9 |
Sunny and mild with a few patches of high cloud, NW winds in the afternoon. | ||||||||||||
25 | 4.3 | 20.7 | 11.9 | 3.7 | 27 | 84 | North Nth West | 0 | 0 | 1023.1 | 1025.2 | +2.1 |
Sunny and mild with northerly winds. | ||||||||||||
26 | 2.9 | 19.8 | 11.5 | 3.8 | 39 | 86 | East Nth East | 0 | 0 | 1016.1 | 1024.5 | -8.4 |
Mild with northerly winds in the afternoon and increasing cloud. | ||||||||||||
27 | 8.3 | 11.6 | 9.5 | 6.0 | 28 | 136 | South West | 0.4 | 1.4 | 1016.6 | 1021.7 | -5.1 |
Light rain and drizzle at times, southerly winds. | ||||||||||||
28 | 7.0 | 12.0 | 8.9 | 7.3 | 24 | 167 | South West | 0.2 | 2.0 | 1011.0 | 1016.5 | -5.5 |
Overcast with light rain and drizzle. Cloud breaking with sunny intervals in the afternoon. Southerly winds. | ||||||||||||
29 | 7.3 | 11.3 | 8.6 | 3.4 | 18 | 78 | East Nth East | 0 | 0 | 1007.7 | 1014.7 | +7.0 |
Cloudy and cool with light NE wind turning southerly in the afternoon. | ||||||||||||
30 | 2.1 | 10.6 | 7.0 | 3.8 | 21 | 86 | South Sth West | 0.2 | 1.4 | 1014.0 | 1029.7 | +14.3 |
Showers clearing before dawn. Cloudy with some sunny intervals in the afternoon, light southerly winds turning NE from mid afternoon. | ||||||||||||
31 | 2.4 | 10.1 | 6.5 | 6.2 | 31 | 140 | East Nth East | 0 | 0 | 1028.7 | 1034.3 | +5.6 |
Cloud breaking in the afternoon, cool NE wind. |