September 2020 was settled for the most part with nearly three weeks of dry weather which broke on the 23rd with much cooler and wetter conditions. It was dry overall, the total rainfall being 39.0 mm, only 48% of the Usk* average for September of 81.2 mm. There were 21 days of rainfall of 0.2 mm or below. The wettest day was the 24th, when 14.6 mm fell.
The month was a little cooler than average, with the mean maximum temperature of 18.7 °C being 0.5 °C below the Usk average for September of 19.2 °C. The highest was 25.9 °C on the 14th and the lowest of 12.1 °C occurred on the 24th. The temperature exceeded 20 °C on 9 occasions.
* Usk is the nearest Met Office station for which long term averages (1981-2010) are available.
Day by day data for September are given below:-
MONTHLY CLIMATOLOGICAL SUMMARY for SEP. 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 13.3 19.6 14:00 8.2 2:00 5.0 0.1 0.0 0.3 8.0 13:00 SSE
2 14.1 16.6 10:00 9.8 7:00 4.2 0.0 4.8 1.4 20.9 00:00 SE
3 16.2 18.7 16:00 12.3 00:00 2.1 0.0 0.8 1.4 19.3 1:30 SE
4 13.2 17.8 14:00 10.0 6:00 5.1 0.0 0.0 0.3 9.7 13:00 SW
5 13.1 18.6 15:30 8.9 4:30 5.2 0.0 0.0 0.6 12.9 17:00 WSW
6 14.1 19.6 15:30 10.2 6:00 4.3 0.0 0.4 0.0 8.0 19:00 SE
7 13.9 16.6 13:30 9.1 7:00 4.4 0.0 0.6 1.0 14.5 13:30 SE
8 17.6 22.6 12:30 13.2 00:00 1.6 0.9 0.0 1.0 11.3 7:30 SE
9 15.9 20.8 16:30 10.7 00:00 2.8 0.4 0.0 0.6 11.3 18:00 WSW
10 12.8 17.1 12:30 8.1 7:00 5.4 0.0 0.0 0.0 8.0 10:30 WSW
11 12.8 16.8 17:00 8.1 4:00 5.4 0.0 0.0 0.6 14.5 18:30 SE
12 15.0 19.2 15:30 12.2 7:30 3.4 0.1 0.2 1.0 12.9 16:30 SE
13 16.7 21.6 16:00 13.1 0:30 2.3 0.7 0.0 1.4 16.1 1:00 SE
14 17.3 25.9 16:30 9.9 6:00 2.9 2.0 0.2 0.6 11.3 13:00 SSE
15 19.0 25.4 13:30 14.1 4:30 1.3 2.0 0.0 0.0 6.4 15:00 SW
16 17.8 23.9 16:00 14.1 7:00 1.7 1.2 0.0 2.9 20.9 21:30 NE
17 15.1 19.3 16:30 11.7 7:30 3.3 0.1 0.0 4.0 19.3 14:00 NE
18 13.7 18.9 15:30 9.2 7:00 4.7 0.0 0.0 4.8 20.9 11:00 NE
19 14.8 20.0 15:30 10.9 2:00 3.7 0.2 0.0 6.0 24.1 14:00 NE
20 15.2 19.6 15:30 12.4 3:30 3.3 0.2 0.0 3.7 22.5 1:00 NE
21 15.7 23.3 16:30 9.6 6:30 3.5 0.9 0.0 0.3 6.4 14:00 NE
22 15.4 20.1 13:00 12.3 7:30 3.0 0.1 0.0 0.8 12.9 14:00 SE
23 12.8 16.1 15:00 6.5 00:00 5.5 0.0 7.2 0.6 14.5 7:30 SE
24 8.4 12.1 14:30 5.6 1:30 9.8 0.0 14.6 1.3 19.3 6:00 SE
25 9.4 14.1 16:30 5.7 4:30 8.9 0.0 0.2 2.3 29.0 14:00 SE
26 8.8 12.6 15:00 4.6 5:30 9.5 0.0 0.0 2.4 24.1 14:30 NE
27 9.4 15.3 16:30 5.7 00:00 8.8 0.0 0.0 2.1 22.5 12:30 NE
28 11.3 17.0 16:30 3.6 4:30 7.0 0.0 0.4 0.2 11.3 16:30 SE
29 12.6 16.5 13:00 7.6 00:00 5.7 0.0 0.4 0.2 8.0 1:00 SE
30 11.5 14.1 12:00 7.3 0:30 6.8 0.0 9.2 2.6 25.7 16:00 SE
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13.9 25.9 14 3.6 28 140.7 8.9 39.0 1.5 29.0 25 SE
Max >= 32.0: 0
Max <= 0.0: 0
Min <= 0.0: 0
Min <= -18.0: 0
Max Rain: 14.60 ON 24/09/20
Days of Rain: 12 (> .2 mm) 4 (> 2 mm) 0 (> 20 mm)
Heat Base: 18.3 Cool Base: 18.3 Method: Integration