A warm and very wet month. Despite the rainfall total there was an eight day spell (4-11) with no measurable rainfall. No ground frost recorded at all, which is unusual for May.
Anomalies (in brackets) refer to the estimated 1991-2020 averages.
Mean max: 18.3 (+2.1)
Mean min: 9.1 (+2.9)
Mean temp: 13.7 (+2.5)
Mean 30cm earth temp: 14.3
Highest max: 24.3 (12th)
Lowest max: 11.5 ( 3rd)
Lowest min: 4.1 ( 5th)
Highest min: 12.9 (15th)
Lowest grass min: 2.4 ( 5th)
Air frosts: 0 (-1)
Air frost hours: 0.0
Ground frosts: 0 (-5)
Days with max 20.0 to 24.9: 9
Days with max 15.0 to 19.9: 17
Days with max 10.0 to 14.9: 5
Days with min 10.0 to 14.9: 12
Days with min 5.0 to 9.9: 18
Days with min 0.0 to 4.9: 1
Total rainfall: 96.7 mm (176%)
Wettest day: 31.3 mm (21st)
Rain days (0.2 mm or more): 15 ( 0)
Wet days (1.0 mm or more): 11 ( +1)
Days >= 10mm: 2 ( +1)
Days >= 20mm: 2
Days with snow/sleet falling: 0
Days with 50%+ snow cover at 09z: 0 ( 0)
Deepest at 0900z 0 cm (n/a)
Days with thunder heard: 3
Days with hail: 0
Days with fog at 0900z: 0
Highest 10-min mean wind: 18 kn (31st)
Max gust: 31 kn (26th)
Days with gale: 0
Highest wind run: 218.0 nm (30th)
Wind direction at 0900z: N: 1; NE: 8; E: 3; SE: 1; S: 4; SW: 8; W: 5; NW: 1; Calm: 0
Maximum pressure: 1028.2 ( 8th)
Minimum pressure: 997.4 (14th)