April 2018 was mostly cold and reasonably wet, but was notable for a heatwave in the middle which provided the hottest April day for some 60 years. Overall, the average maximum temperature of 13.2°C was 0.8°C below the Usk average for April of 14.0°C with a peak of 25.5°C on the 19th, the minimum temperature being 1.1°C on the 1st and the 2nd.
There were 12 days when no rain (or a trace) fell, the wettest days being 27th when 18.0 mm fell each. It was much wetter overall than usual with the total rainfall of 117.2 mm being 74% above the Usk* average for April of 67.5 mm.
* Usk is the nearest Met Office station for which long term averages (1981-2010) are available.
Day by day data for April are given below:-
MONTHLY CLIMATOLOGICAL SUMMARY for APR. 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 4.3 7.1 13:00 1.1 7:30 14.0 0.0 9.0 1.9 20.9 21:00 ENE
2 7.5 11.3 17:30 1.1 1:00 10.8 0.0 17.0 3.2 30.6 15:00 SE
3 10.0 13.4 15:00 7.1 00:00 8.3 0.0 1.4 3.7 20.9 5:00 SE
4 7.6 11.8 15:00 4.3 22:30 10.7 0.0 12.2 2.4 19.3 7:00 SE
5 6.4 10.7 16:00 1.2 7:00 11.9 0.0 0.0 2.1 19.3 19:30 SE
6 9.0 15.2 14:30 4.4 0:30 9.3 0.0 0.0 5.1 32.2 7:30 SE
7 9.1 12.1 17:00 7.2 3:30 9.3 0.0 8.6 0.0 8.0 10:00 ENE
8 8.4 11.1 19:00 6.3 6:00 9.9 0.0 0.0 0.0 4.8 12:00 ENE
9 8.1 10.8 12:30 5.6 3:30 10.3 0.0 14.8 0.6 12.9 00:00 ENE
10 8.6 9.7 1:30 7.3 13:00 9.8 0.0 12.0 1.6 19.3 1:00 ENE
11 7.5 8.9 4:00 6.4 14:30 10.8 0.0 1.4 0.6 11.3 6:00 ENE
12 6.3 7.2 15:00 5.6 6:30 12.0 0.0 0.6 0.2 9.7 8:30 ENE
13 7.7 10.8 15:00 5.7 4:00 10.6 0.0 0.2 0.2 9.7 14:30 ENE
14 11.2 15.9 17:30 6.9 7:30 7.1 0.0 0.0 1.3 19.3 14:30 SE
15 9.6 11.3 12:30 8.5 6:30 8.8 0.0 7.4 3.4 19.3 12:30 SE
16 10.1 13.7 14:00 7.2 6:30 8.2 0.0 0.4 3.2 22.5 17:30 ESE
17 11.4 12.5 16:30 9.9 1:30 6.9 0.0 3.4 5.0 32.2 10:00 SE
18 16.1 21.4 16:00 11.7 7:30 2.8 0.6 0.0 5.0 22.5 17:00 SE
19 18.3 25.5 14:30 11.1 7:00 2.2 2.2 0.0 0.8 11.3 1:30 SSW
20 14.9 22.5 16:30 9.2 6:30 4.1 0.7 0.0 0.3 11.3 17:30 S
21 15.2 21.7 17:30 8.2 6:30 3.7 0.6 0.8 1.9 19.3 22:00 ENE
22 13.8 18.8 13:30 8.0 00:00 4.5 0.0 0.0 1.8 16.1 12:30 W
23 10.3 14.4 13:30 7.6 1:00 8.1 0.0 0.0 1.6 19.3 20:00 W
24 10.4 12.9 13:30 7.8 00:00 7.9 0.0 6.4 2.1 22.5 15:00 W
25 9.2 12.5 16:00 5.9 6:00 9.2 0.0 1.8 1.4 22.5 18:30 W
26 9.3 14.3 15:30 5.8 5:00 9.1 0.0 1.0 1.4 16.1 16:00 W
27 6.8 8.4 15:00 5.6 10:30 11.6 0.0 18.0 0.5 11.3 8:00 ENE
28 6.8 9.1 15:00 5.1 7:00 11.6 0.0 0.8 0.0 8.0 0:30 ENE
29 6.3 8.4 14:30 4.7 5:30 12.1 0.0 0.0 1.1 12.9 11:00 ENE
30 6.7 11.6 15:30 2.8 5:30 11.7 0.0 0.0 1.8 17.7 10:00 E
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9.6 25.5 19 1.1 1 267.2 4.0 117.2 1.8 32.2 6 ENE
Max >= 32.0: 0
Max <= 0.0: 0
Min <= 0.0: 0
Min <= -18.0: 0
Max Rain: 18.01 ON 27/04/18
Days of Rain: 19 (> .2 mm) 10 (> 2 mm) 0 (> 20 mm)
Heat Base: 18.3 Cool Base: 18.3 Method: Integration