May 2018 saw 18 days on which no significant rain fell. Nevertheless, the total rainfall of 92.8 mm was 30% above the Usk* average for May of 71.5 mm, much of it falling on the last eight days of the month, which were unsettled and thundery at times..
Maximum temperatures exceeded 20°C on twelve days with a high of 26.5°C on the 7th. May was very warm overall as a result, and the average maximum temperature of 19.0°C was 1.5°C above the Usk average for May of 17.5°C and, in the UK overall, May 2018 was the hottest since records began.
* Usk is the nearest Met Office station for which long term averages (1981-2010) are available.
Day by day data for May are given below:-
MONTHLY CLIMATOLOGICAL SUMMARY for MAY. 2018
NAME: Penallt 210 CITY: 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 8.2 13.6 11:00 1.6 4:30 10.2 0.0 2.0 2.4 19.3 11:00 ESE
2 9.7 13.9 14:00 6.6 22:30 8.7 0.0 11.2 2.9 27.4 2:30 SE
3 10.3 16.3 14:30 5.0 5:30 8.0 0.0 0.0 0.6 16.1 18:00 WSW
4 12.5 15.6 17:00 8.2 1:00 5.8 0.0 0.0 0.2 8.0 10:00 ESE
5 15.8 22.9 17:00 7.7 6:00 3.6 1.1 0.0 0.3 9.7 14:00 ESE
6 17.4 24.0 18:00 10.1 6:00 2.6 1.6 0.0 0.8 11.3 11:30 ENE
7 19.2 26.5 16:00 11.6 6:00 1.9 2.7 0.0 0.8 12.9 14:00 ENE
8 13.9 19.3 13:30 9.3 00:00 4.5 0.1 0.0 0.8 11.3 11:00 W
9 11.2 16.6 11:30 6.5 6:30 7.1 0.0 2.0 0.8 16.1 11:30 WSW
10 10.4 16.8 13:30 5.4 23:30 7.9 0.0 0.2 0.3 11.3 18:00 W
11 10.2 14.2 14:30 5.7 0:30 8.2 0.0 4.0 2.6 24.1 11:30 SE
12 9.4 14.1 15:30 4.1 4:30 8.9 0.0 0.0 0.2 6.4 11:00 E
13 12.1 19.2 14:00 5.9 3:00 6.2 0.0 0.0 0.2 8.0 18:30 E
14 13.6 21.2 15:30 5.0 5:30 5.2 0.4 0.0 0.5 8.0 15:00 E
15 16.1 23.6 15:30 8.3 6:00 3.4 1.2 0.0 0.6 8.0 21:30 E
16 12.2 14.9 15:30 8.5 00:00 6.2 0.0 0.0 0.6 16.1 17:30 ENE
17 11.3 17.6 16:00 4.9 5:30 7.0 0.0 0.0 0.6 11.3 8:00 ENE
18 12.7 19.1 13:30 5.2 5:30 5.7 0.1 0.0 0.3 9.7 0:30 ENE
19 15.2 22.2 15:30 7.7 5:30 3.8 0.7 0.0 0.2 8.0 14:30 W
20 16.0 22.4 16:30 8.6 5:30 3.3 1.0 0.0 0.6 12.9 12:30 ENE
21 16.9 24.2 15:30 9.3 5:30 2.9 1.5 3.2 0.5 9.7 21:00 ENE
22 16.4 22.3 15:00 11.2 6:30 2.8 0.9 0.0 0.6 9.7 3:30 ENE
23 14.8 21.2 17:00 9.3 6:00 3.9 0.4 0.0 0.8 12.9 14:00 ENE
24 11.4 14.2 0:30 8.8 7:30 6.9 0.0 12.6 0.2 16.1 2:00 ENE
25 12.6 13.3 15:00 11.8 9:00 5.7 0.0 18.4 0.0 8.0 7:00 E
26 15.4 21.0 17:30 12.9 0:30 3.3 0.3 0.6 0.8 20.9 20:30 ENE
27 15.7 21.6 17:30 12.0 4:00 3.0 0.4 19.8 0.2 11.3 6:30 ENE
28 16.8 19.8 18:30 14.8 2:00 1.7 0.1 0.0 0.0 4.8 12:30 E
29 15.9 19.1 15:30 13.6 7:30 2.4 0.0 0.0 0.6 12.9 12:30 ENE
30 14.3 15.4 0:30 13.3 8:30 4.1 0.0 7.2 0.0 9.7 2:00 ENE
31 17.4 22.5 13:30 14.7 0:30 1.6 0.7 11.6 0.3 9.7 9:00 ENE
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13.7 26.5 7 1.6 1 156.6 13.2 92.8 0.7 27.4 2 ENE
Max >= 32.0: 0
Max <= 0.0: 0
Min <= 0.0: 0
Min <= -18.0: 0
Max Rain: 19.81 ON 27/05/18
Days of Rain: 12 (> .2 mm) 10 (> 2 mm) 0 (> 20 mm)
Heat Base: 18.3 Cool Base: 18.3 Method: Integration