May 2020

A creeping buttercup flower smiling in this most beautiful of all months

A warm and record-breakingly sunny month with well-below average rainfall. Warmest May since 2018 (14.1C) and the driest and sunniest May on record.

Summary for May 2020
Mean Max: 20.2C (+3.6C)
Mean Min: 6.8C (-1.4C)
Mean: 13.5C (+1.1C)
Mean (integrated):  13.1C  
High Max: 26.2C 27th
Low Max: 13.7C 5th
High Min: 14.0C 22nd 
Low Min: 0.6C 15th
Mean Grass Min: 4.1C  
Grass Min: -1.7C 12th
Days  >20C 19 Days  
Days >15C 28 Days  
Nights  >10C 4 Days  
Nights  >5C 23 Days  
Rain Total (gauge): 10.7 mm (19%)
Rain Total (tipping bucket): 10.4 mm (19%)
Rain Days >0.2 mm: 4 Days  
Rain Days >1.0 mm: 1 Days  
Max 24 hrs: 8.2 mm 5th
Days without any rain: 27  
Air Frost: 0 Days  
Grass Frost: 2 Days  
Snow Falling: 0 Days  
Snow (50%) @ 9am: 0 Days  
Ice Days: 0 Days  
Thunder Heard: 0 Days  
Hail <5 mm: 0 Days  
Hail >5 mm: 0 Days  
Fog @ 9am: 0 Days  
Total Monthly Sunshine: 357.8 Hours (173%)
Most Sunshine in a Day: 15.3 Hours 31st
Average Daily Sunshine: 11.5 Hours  
Sunless Days: 0 Days  
Cloudless Days: 11 Days  
Total Possible Sunshine: 481.9 Hours  
Percentage of Total Sun: 74%  
Average Sunny Interval: 24.3 mins
Maximum UV Index: 9.0 19th
Mean Soil Temp @ 10 cm: 14.3C  
Min Soil Temp @ 10 cm: 12.2C 2nd 
Max Soil Temp @ 10 cm: 17.0C 29th
Mean Soil Temp @ 30 cm: 13.8C  
Min Soil Temp @ 30 cm: 12.2C 2nd 
Max Soil Temp @ 30 cm: 16.1C 29th
Mean Soil Temp @ 100 cm: 12.5C  
Min Soil Temp @ 100 cm: 11.7C 2nd 
Max Soil Temp @ 100 cm: 13.9C 29th
Ave 10 Min Wind >39 mph: 0.00 Days  
N: 6.23 Days 20%
NE: 3.71 Days 12%
E: 2.25 Days 7%
SE: 2.36 Days 8%
S: 2.97 Days 10%
SW: 3.91 Days 13%
W: 1.39 Days 4%
NW: 3.09 Days 10%
Calm: 5.09 Days 16%
Wind Chill Low: -0.2C 12th
Mean Wind: 3.0 mph  
Max Gust: 35 mph 22nd 
Mean Cloud Cover: 20%  
Mean RH @ 9am: 83%  
Rain >0.1mm/hour: 2.6 Hours  
Frost Duration: 0.0 Hours  
Air Frost in a Day: 0.0 Hours 1st
Mean Sea Temperature: 13.3C (+0.6C)
Normal for Month: 12.7C  
Max Sea Temperature: 17.3C 30th
Min Sea Temperature: 11.1C 2nd 
Mean Pressure @ 9am: 1021.7 hPa  
Mean Pressure: 1021.0 hPa  
Max Pressure: 1036.6 hPa 26th
Min Pressure: 997.0 hPa 1st
Max Change in 24 hours: 9.3 hPa 1st
Radiation Daily Mean: 25.32 MJ/m  
Max Daily Value: 31.50 MJ/m 29th
Min Daily Value: 9.35 MJ/m 5th
Number of Days with Data: 31 Days  
1-Hour Maximum: 863 W/m 24th
Starting Time of the Hour:   13:00
Max Dewpoint: 18.2C 27th
Min Dewpoint: -0.2C 12th
Mean Dewpoint: 8.8C  
Max Humidity: 98% 2nd 
Min Humidity: 40% 8th
Mean Humidity: 73%  
 
Weather Data for Otter Valley, Devon. May 2020
  Temp oC Grass Hum (%) Soil oC (cm) Soil DP (oC) Wind (mph) Rain Air (hPa) W/m UV Sun Frost Sea Observations
  Min Max Min Min Max 10 30 100 (cb) Min Max Max Ave Run mm Min Max Max Max Hours Hours Temp
1 5.9 16.6 2.2 54 97 12.4 12.2 11.7 2.7 5.0 9.5 24 4.2 100 0.4 997 1006 957 6.0 10.4 0.0 11.5 Sunny intervals all day
2 3.1 17.3 0.6 63 98 12.2 12.2 11.7 2.0 2.3 12.2 19 2.4 56 0.9 1006 1014 980 6.4 9.9 0.0 11.6 Sunny intervals all day
3 8.8 14.2 6.1 88 95 12.5 12.2 11.7 2.0 7.3 12.9 12 0.7 18 0.9 1013 1015 738 4.8 1.0 0.0 11.9 Sunny intervals all day
4 8.9 16.2 5.6 78 98 13.1 12.8 11.7 2.0 8.0 13.3 16 1.9 45 0.0 1015 1019 738 7.2 5.1 0.0 11.7 Brief sunny intervals
5 8.9 13.7 7.8 73 95 12.7 12.8 11.7 2.0 5.7 10.3 23 4.3 104 8.2 1014 1020 453 3.6 0.5 0.0 11.6 Heavy rain am, cloudy pm
6 6.5 16.7 3.9 56 91 12.7 12.6 11.7 2.0 4.4 11.1 13 1.8 44 0.0 1020 1025 773 6.3 12.9 0.0 12.0 Sunshine & light showers
7 5.3 21.1 3.3 67 96 13.2 12.8 11.7 2.0 4.3 15.8 11 1.6 38 0.0 1019 1024 812 6.7 11.2 0.0 12.6 Brief sunny intervals
8 6.8 21.8 4.4 40 98 14.1 13.3 11.7 1.7 6.1 12.5 10 0.9 20 0.0 1015 1020 904 7.1 12.2 0.0 13.1 Sunshine & light showers
9 6.3 24.6 3.9 47 98 14.3 13.6 12.2 1.0 5.6 14.8 13 0.9 23 0.0 1008 1016 787 6.4 14.0 0.0 13.7 Sunny ints am, rain pm
10 7.1 22.2 5.0 58 97 14.4 13.9 12.2 0.0 5.5 16.0 33 4.5 108 0.0 1006 1013 865 6.4 8.4 0.0 12.9 Brief sunny intervals
11 4.0 14.2 1.1 47 80 13.5 13.6 12.2 0.0 0.0 5.4 29 6.1 147 0.0 1013 1023 1059 7.1 11.2 0.0 12.5 Sunny intervals all day
12 1.3 15.8 -1.7 46 93 12.8 13.1 12.2 1.0 -0.2 7.0 16 3.0 72 0.0 1017 1024 878 6.8 14.6 0.0 12.6 Sunshine and showers
13 3.3 16.1 0.6 51 96 12.7 13.0 12.2 1.0 1.5 8.1 20 3.6 86 0.0 1016 1019 1041 7.4 9.2 0.0 12.5 Sunny intervals all day
14 4.2 16.2 0.6 41 82 12.4 12.6 12.2 1.0 0.2 4.9 19 4.2 100 0.0 1019 1023 1040 7.2 13.6 0.0 12.4 Sunny intervals all day
15 0.6 20.3 -1.7 45 97 12.4 12.6 12.2 1.0 -0.2 9.5 13 2.5 60 0.0 1022 1026 977 7.6 13.9 0.0 12.8 Sunny intervals all day
16 3.2 19.3 1.1 51 96 12.9 12.8 12.2 1.0 2.2 10.7 16 2.3 55 0.0 1024 1026 1002 7.6 9.5 0.0 12.9 Sunny all day
17 5.1 20.8 2.8 49 96 13.5 13.1 12.2 1.0 4.1 13.2 16 2.5 60 0.0 1024 1026 971 8.5 12.6 0.0 13.6 Brief sunny intervals
18 4.5 21.1 1.7 61 97 13.8 13.3 12.2 1.0 3.6 14.5 19 2.3 54 0.0 1024 1026 807 7.6 14.9 0.0 13.9 Brief sunny intervals
19 8.8 21.2 5.6 67 95 14.7 13.9 12.3 1.0 7.5 16.0 15 2.4 56 0.0 1023 1025 1129 9.0 9.8 0.0 13.9 Cloudy all day. Light drizzle
20 6.0 22.3 3.9 41 98 15.0 14.2 12.8 1.8 5.4 15.3 15 2.6 62 0.0 1019 1024 825 7.7 15.0 0.0 14.2 Sunny intervals all day
21 8.1 24.9 5.0 46 98 15.3 14.4 12.8 2.0 7.2 16.5 22 2.6 63 0.0 1015 1021 830 7.7 11.7 0.0 14.6 Sunny intervals all day
22 14.0 19.9 11.7 59 94 16.0 15.0 12.8 2.0 10.5 14.0 35 8.6 207 0.0 1012 1019 1029 8.4 7.5 0.0 13.2 Sunny all day
23 10.6 20.1 6.1 45 87 15.3 14.9 13.0 2.0 6.6 10.7 27 7.0 167 0.0 1019 1028 1037 7.2 9.7 0.0 12.4 Sunny all day
24 11.3 22.5 7.8 47 89 15.4 14.8 13.3 2.0 8.1 12.7 17 3.9 94 0.0 1028 1033 910 7.8 12.1 0.0 13.6 Sunny all day
25 5.1 22.8 3.3 46 97 15.5 14.9 13.3 2.0 4.2 12.2 16 2.8 67 0.0 1033 1035 819 7.6 15.1 0.0 13.6 Sunny all day
26 6.2 24.2 3.9 51 97 15.8 15.2 13.3 2.0 5.4 14.9 15 2.4 58 0.0 1034 1037 814 7.7 15.2 0.0 14.2 Sunny all day
27 9.8 26.2 7.8 58 97 16.6 15.5 13.3 2.0 8.9 18.2 15 3.7 88 0.0 1033 1035 808 7.6 15.2 0.0 14.8 Sunny all day
28 8.9 20.7 6.7 56 96 16.8 15.9 13.3 2.0 6.9 14.9 13 1.4 33 0.0 1029 1034 795 7.7 15.3 0.0 14.8 Sunny all day
29 13.5 22.9 7.8 43 77 16.8 16.0 13.9 2.0 6.3 13.0 20 2.5 62 0.0 1022 1029 832 7.9 15.3 0.0 14.7 Sunny intervals all day
30 6.8 24.3 4.4 43 93 16.7 16.0 13.9 2.0 4.9 13.6 10 1.4 53 0.0 1019 1023 824 7.6 15.3 0.0 15.7 Sunny intervals all day
31 9.2 24.9 6.1 45 58 17.0 16.1 13.9 2.0 7.8 14.7 17 2.6 27 0.0 1020 1020 819 7.5 15.3 0.0 15.5 Sunny intervals all day
6.8 20.2 4.1 54 93 14.3 13.8 12.5 1.6 5.0 12.5 18 3.0 2224 10.4 1019 1023 879 7.2 357.8 0.0 13.3  
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