August 2020 was a little cooler than usual and well above average in terms of rainfall. The total rainfall of 148.6 mm was double the Usk* average for August of 73.9 mm and there were 15 days on which no significant rain (>0.2 mm) fell. On the other hand, rainfall exceeded one inch (25.4 mm) on two days, the 25th (28.6 mm) and the 27th (27.4 mm) and the second half of the month was much wetter than the first half.
The average maximum temperature of 21.4 °C was 0.7 °C below the Usk average for August of 22.1 °C. As for rainfall, the first half of the month was much warmer than the second and a 6-day heatwave starting on the 7th culminated in a record Penallt high of 33.2 °C on the 12th.
The second half of August was about 5 °C cooler than the first half with the last five days being particularly autumnal in feel, a maximum of under 15 °C on the 27th being the lowest point.
* Usk is the nearest Met Office station for which long term averages (1981-2010) are available.
Day by day data for August are
MONTHLY CLIMATOLOGICAL SUMMARY for AUG. 2020
NAME: Penallt210 CITY: Penallt STATE:
ELEV: 210 m LAT: 51° 48' 00" N LONG: 2° 42' 00" W
TEMPERATURE (°C), RAIN (mm), WIND SPEED (km/hr)
HEAT COOL AVG
MEAN DEG DEG WIND DOM
DAY TEMP HIGH TIME LOW TIME DAYS DAYS RAIN SPEED HIGH TIME DIR
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1 17.1 22.6 12:30 11.8 00:00 1.9 0.7 0.0 1.0 14.5 11:00 W
2 16.1 22.2 15:30 10.5 5:30 2.9 0.8 0.0 0.8 16.1 15:00 W
3 14.8 20.2 17:30 8.6 5:30 3.7 0.2 0.0 0.6 14.5 15:00 WSW
4 14.3 19.7 17:00 7.7 6:00 4.0 0.1 0.0 2.1 24.1 14:00 SE
5 18.1 21.6 14:00 16.2 3:00 0.8 0.6 2.0 3.2 24.1 14:30 SE
6 18.4 22.4 18:00 15.6 4:00 1.0 1.1 0.6 1.0 12.9 16:00 SSE
7 21.5 28.4 16:30 14.2 6:30 0.7 3.9 0.0 0.5 9.7 14:30 SE
8 21.9 28.7 17:30 16.8 6:00 0.4 4.0 0.0 3.1 20.9 23:00 NE
9 17.8 23.6 18:00 14.8 7:00 1.3 0.8 0.0 2.7 17.7 3:30 NE
10 20.6 26.6 16:30 16.2 7:30 0.5 2.8 0.0 1.9 12.9 6:00 NE
11 23.6 31.4 16:30 17.4 6:30 0.1 5.4 0.0 0.6 9.7 12:30 NE
12 25.1 33.2 17:30 19.7 6:00 0.0 6.7 3.4 1.1 20.9 19:30 NE
13 19.1 21.9 12:30 17.9 23:30 0.0 0.8 3.2 2.1 16.1 13:00 NE
14 17.2 19.4 18:00 16.0 10:00 1.2 0.1 8.0 1.3 12.9 5:30 NE
15 16.2 17.4 0:30 14.6 10:00 2.1 0.0 0.6 1.9 12.9 8:00 NE
16 17.1 20.9 17:00 15.0 22:30 1.6 0.4 21.0 0.8 11.3 7:00 NE
17 17.2 22.7 15:30 13.3 7:00 1.7 0.7 0.8 0.6 14.5 17:00 SE
18 18.2 23.2 16:30 14.6 2:00 1.3 1.1 0.6 1.3 19.3 4:00 SE
19 17.6 19.6 16:30 15.4 2:30 1.0 0.2 34.0 3.7 27.4 00:00 SE
20 17.2 21.2 14:30 13.4 6:30 1.5 0.4 0.2 4.0 24.1 0:30 SE
21 17.0 20.2 11:30 14.9 23:30 1.4 0.1 2.2 5.3 33.8 5:00 SE
22 15.4 18.2 13:00 14.0 5:30 2.9 0.0 5.2 2.4 17.7 1:00 SE
23 15.2 18.7 12:30 12.6 3:30 3.1 0.0 0.4 0.6 11.3 14:00 SE
24 16.1 21.6 15:30 11.7 2:00 2.7 0.4 0.0 0.5 11.3 12:00 SE
25 15.7 17.3 11:00 14.3 6:30 2.6 0.0 28.6 5.0 33.8 16:00 SE
26 15.9 20.9 14:30 10.2 00:00 2.7 0.3 0.0 1.6 19.3 1:00 WSW
27 12.6 14.6 9:00 10.3 0:30 5.7 0.0 27.4 0.6 14.5 16:30 SE
28 12.8 15.8 14:00 9.9 00:00 5.5 0.0 10.4 1.9 22.5 18:30 NE
29 12.0 16.1 14:30 8.5 3:00 6.3 0.0 0.0 3.2 20.9 6:30 NE
30 11.4 16.3 15:30 7.4 00:00 6.8 0.0 0.0 1.9 17.7 12:00 NE
31 11.8 17.6 17:00 5.3 6:30 6.5 0.0 0.0 0.5 9.7 11:30 SE
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16.9 33.2 12 5.3 31 74.0 31.6 148.7 1.9 33.8 21 SE
Max >= 32.0: 1
Max <= 0.0: 0
Min <= 0.0: 0
Min <= -18.0: 0
Max Rain: 34.01 ON 19/08/20
Days of Rain: 17 (> .2 mm) 11 (> 2 mm) 4 (> 20 mm)
Heat Base: 18.3 Cool Base: 18.3 Method: Integration