Mostly fine for the first 10 days, unsettled for the next 10, fine again during the 4th week and unsettled at the end. Night-time temperatures above average, and daytime temperatures below average.
Prolonged heavy and thundery rain in the vicinity on the 18th.
Persistent lightning to the east for a time during the early hours of the 27th.
Temperature: [Minimum]:
Lowest: 5.6 degs C on the 10th. Every May since 2013 has had a colder night than this.
Highest: 14.6 degs C on the 31st. Highest May minimum since 2012.
Average minimum: 10.09 degs C. 5th highest of the last 14 Mays.
Nights with temperature below 5 degs C = 0.
Nights with temperature below 0 degs C = 0.
Temperature: [Maximum]:
Lowest: 11.3 degs C on the 6th. Equal to April. The coldest May day since 2005 [= with 2015].
Highest: 21.0 degs C on the 26th. Lowest May maximum since 2013.
Average maximum: 16.39 degs C. 2nd coldest of the last 14 Mays [behind 2013].
Days with temperature above 20 degs C = 3.
Days with temperature above 25 degs C = 0.
Rainfall:
Total: 77.0 mm. 2nd driest month of 2017 so far. Wettest May since 2014.
April 2017: 19.7 mm.
May 2016: 46.1 mm.
Wettest day: 16.0 mm on the 18th. [Wettest day since February 6th].
Driest spell: No measurable rain: 20th to 26th.
Wettest spell: 49.9 mm: 12th to 19th.
Other days with >10 mm: 15th [12.5] and 6th [12.2].
Completely dry days: 17.
Days with no measurable rain: 20.
Cumulatively: 2017: 382.9 mm.
2016: 644.5 mm. [-40.59%].
Thunder:
18th and 27th.
Pressure:
Lowest: 989.5 mb on the 12th.
Highest: 1029.1 mb on the 24th.
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