March 2018 weather data

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March 2018 was much colder and a much wetter than usual. Overall, the average maximum temperature of 8.0°C was a huge 3.1°C below the Usk average for March of 11.1°C and there were three days of sub-zero temperatures throughout as well.

The coldest by day was the 1st, with a maximum of -3.3°C, being the middle of a three day "beast from the east" spell of blizzard conditions.

There were 23 days on which rain was recorded (>0.2 mm), the wettest being the 5th on which 22.8 mm fell. The total rainfall of 170.8 mm was just over double the Usk* average for March of 83.1 mm.

NB Rainfall figures above are underestimated due to snowfall at the beginning of the month being unrecorded.

* Usk is the nearest Met Office station for which long term averages (1981-2010) are available.

Day by day data for March are given below:-

MONTHLY CLIMATOLOGICAL SUMMARY for MAR. 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
------------------------------------------------------------------------------------
1 -4.8 -3.3 00:00 -6.4 0:30 23.2 0.0 0.0 4.0 29.0 12:00 NE
2 -3.0 -2.1 00:00 -3.9 5:00 21.3 0.0 0.0 4.0 30.6 11:30 ENE
3 0.3 2.4 14:30 -2.1 0:30 18.1 0.0 1.6 2.3 25.7 2:00 ENE
4 4.2 7.9 15:30 0.6 0:30 14.2 0.0 13.6 1.8 17.7 13:00 SE
5 5.3 8.7 13:30 3.5 2:00 13.1 0.0 22.8 2.1 17.7 14:30 SE
6 3.9 7.4 14:30 1.3 23:30 14.4 0.0 0.2 0.0 4.8 2:00 W
7 4.6 9.8 12:00 1.0 7:30 13.8 0.0 2.8 0.8 20.9 15:30 W
8 4.8 8.9 12:30 2.4 7:00 13.5 0.0 3.4 1.9 20.9 5:30 W
9 5.9 10.0 00:00 3.1 0:30 12.4 0.0 11.8 1.8 19.3 12:30 ENE
10 9.4 11.3 13:30 4.7 00:00 8.9 0.0 17.4 2.3 20.9 1:00 SE
11 8.2 12.6 12:30 4.6 0:30 10.2 0.0 6.8 1.9 17.7 13:00 ENE
12 7.1 7.9 14:00 5.1 00:00 11.3 0.0 7.0 0.3 9.7 1:30 E
13 6.7 12.5 13:00 2.3 20:30 11.7 0.0 0.0 0.3 14.5 16:00 W
14 7.6 10.7 15:00 3.8 2:00 10.7 0.0 2.2 6.9 32.2 23:30 SE
15 8.5 11.6 15:00 6.8 1:00 9.8 0.0 20.6 3.1 24.1 0:30 SE
16 7.6 12.4 14:00 3.9 7:00 10.8 0.0 8.2 1.0 14.5 14:30 SE
17 0.7 6.5 1:30 -2.4 23:00 17.7 0.0 0.4 3.9 29.0 7:30 ENE
18 -2.4 -1.6 12:30 -3.2 6:30 20.7 0.0 0.0 3.4 29.0 17:00 NE
19 0.6 3.7 16:00 -2.6 0:30 17.8 0.0 0.4 3.5 25.7 20:00 ENE
20 3.8 7.1 15:30 1.1 00:00 14.6 0.0 1.0 1.0 17.7 12:00 ENE
21 5.0 10.3 12:30 -0.4 4:00 13.3 0.0 0.0 0.6 12.9 16:30 W
22 6.1 8.3 11:30 3.5 6:30 12.3 0.0 0.0 1.8 22.5 00:00 W
23 7.3 10.6 13:00 5.3 00:00 11.0 0.0 4.4 2.3 24.1 1:30 W
24 6.2 8.7 13:30 4.2 6:30 12.1 0.0 4.4 0.3 9.7 0:30 ENE
25 8.1 13.4 15:30 4.4 7:30 9.8 0.0 0.0 0.5 11.3 14:00 ENE
26 7.1 13.1 13:00 1.4 7:00 11.3 0.0 0.6 1.1 16.1 00:00 ESE
27 8.5 13.2 12:00 4.9 1:30 9.8 0.0 4.6 1.6 16.1 4:00 SE
28 5.6 8.9 14:30 3.4 11:00 12.8 0.0 6.2 0.3 14.5 15:30 W
29 3.9 6.1 13:30 2.1 6:30 14.4 0.0 8.8 1.4 22.5 15:00 SE
30 3.8 5.8 15:30 0.7 7:00 14.6 0.0 13.6 0.2 11.3 23:30 ENE
31 3.9 5.4 16:30 2.4 4:30 14.4 0.0 8.0 0.8 11.3 11:30 E
-------------------------------------------------------------------------------------
4.6 13.4 25 -6.4 1 423.9 0.0 170.8 1.8 32.2 14 ENE

Max >= 32.0: 0
Max <= 0.0: 3
Min <= 0.0: 7
Min <= -18.0: 0
Max Rain: 22.81 ON 05/03/18
Days of Rain: 24 (> .2 mm) 18 (> 2 mm) 2 (> 20 mm)
Heat Base: 18.3 Cool Base: 18.3 Method: Integration