Summary for May 2019

This May was dominated by cool nights but with plenty of warm and often
sunny afternoons made for a rather beautiful month. The first May air
frosts ever recorded at this station occurred on the 5th & 6th though
they were slight. Rain only fell on 4 days. Overall though it was
cooler, drier and sunnier than average. Coolest May since 2013 (11.3°C),
driest since 2010 (24 mm), sunniest since 2018 (268 hours).

Mean Max: 17.8ºC
Mean Min: 6.3ºC
Mean: 12.1ºC

High Max: 22.3ºC 25th
Low Max: 13.3ºC 5th
High Min: 13.7ºC 31st
Low Min: -0.6ºC 5th
Grass Min: -1.7ºC 5th

Days 20°C 7 Days
Days 15°C 26 Days
Nights 10°C 3 Days
Nights 5°C 10 Days

Rain Total (gauge): 29.0 mm
Rain Days 0.2 mm: 4 Days
Rain Days 1.0 mm: 2 Days
Max 24 hrs: 15.6 mm 8th
Days without any rain: 27

Air Frost: 2 Days
Grass Frost: 2 Days
Snow Falling: 0 Days
Thunder Heard: 1 Day 19th
Hail 5 mm: 0 Days
Hail 5 mm: 0 Days
Fog @ 9am: 0 Days

Total Monthly Sunshine: 244.2 Hours
Most Sunshine in a Day: 14.9 Hours 22nd
Average Daily Sunshine: 7.9 Hours
Sunless Days: 0 Days
Cloudless Days: 5 Days
Total Possible Sunshine: 480.9 Hours
Percentage of Total Sun: 51%
Average Sunny Interval: 22.1 mins

Ave 10 Min Wind 39 mph: 0.00 Days
Calm: 5.47 Days 18%
Mean Wind: 2.8 mph
Max Gust: 33 mph 8th
Mean Cloud Cover: 48%
Mean RH @ 9am: 86%

Mean Pressu 1017.1 hPa
Max Pressu 1038.9 hPa 13th
Min Pressu 989.9 hPa 8th

Max Dewpoint: 16.3ºC 26th
Min Dewpoint: -2.2ºC 4th
Mean Dewpoint: 7.9ºC

Max Humidity: 97% 2nd
Min Humidity: 32% 4th
Mean Humidity: 76%

--
Nick Gardner
Otter Valley, Devon
20 m amsl
http://www.ottervalleyweather.me.uk