May 2013
Roe deer amongst the bluebells in a Devonshire woodland. Taken on a warm and sunny day in May 2013.
A fairly sunny month with below average rainfall and temperatures.
Summary for  May 2013
Mean Max: 16.6C (-0.0C)
Mean Min: 6.0C (-2.2C)
Mean: 11.3C (-1.1C)
 
High Max: 23.7C 31st
Low Max: 9.9C 14th
High Min: 11.1C 5th
Low Min: 0.9C 1st
Mean Grass Min: 3.7C
Grass Min: -0.5C 1st
 
Rain Total (gauge): 51.3 mm (92%)
Rain Total (tipping bucket): 50.4 mm (90%)
Rain Days >0.2 mm: 12 Days
Rain Days >1.0 mm: 9 Days
Max 24 hrs: 12.0 mm 14th
Days without any rain: 19
 
Air Frost: 0 Days
Grass Frost: 1 Day 1st
Snow Falling: 0 Days
Snow (50%) @ 9am: 0 Days
Ice Days: 0 Days
Thunder Heard: 1 Day 17th
Hail <5 mm: 0 Days
Hail >5 mm: 0 Days
Fog @ 9am: 0 Days
 
Total Monthly Sunshine: 213 Hours (111%)
Most Sunshine in a Day: 14.8 Hours 26th
Average Daily Sunshine: 6.9 Hours
Sunless Days: 1 Day 28th
Cloudless Days: 4 Days
Total Possible Sunshine: 481.5 Hours
Percentage of Total Sun: 44%
Maximum UV Index: 7.5 22nd 
Time of Max UV: 14:00
 
Mean Soil Temp @ 30 cm: 13.4C
Min Soil Temp @ 30 cm: 12.1C 1st
Max Soil Temp @ 30 cm: 14.4C 22nd 
Mean Soil Temp @ 100 cm: 12.7C
Min Soil Temp @ 100 cm: 11.4C 1st
Max Soil Temp @ 100 cm: 13.4C 28th
 
Ave 10 Min Wind >39 mph: 0.00 Days
N: 10.21 Days
NE: 0.47 Days
E: 1.00 Days
SE: 1.14 Days
S: 5.04 Days
SW: 3.97 Days
W: 1.42 Days
NW: 6.86 Days
Calm: 0.89 Days
Wind Chill Low: 0.4C 1st
Mean Wind: 3.8 mph
Max Gust: 37 mph 9th
  31.00 Days
Mean Cloud Cover: 64%
Mean RH @ 9am: 85%
Rain >0.1mm/hour: 34.8 Hours
Frost Duration: 0.0 Hours
Air Frost in a Day: 0.0 Hours 1st
 
Mean Sea Temperature: 10.7C (-2.2C)
Normal for Month: 12.9C
Max Sea Temperature: 12.4C 29th
Min Sea Temperature: 9.4C 1st
 
Mean Pressure @ 9am: 1013.3 hPa (-1.3 hPa)
Mean Pressure: 1012.5 hPa (-2.1 hPa)
Max Pressure: 1025.4 hPa 1st
Min Pressure: 982.4 hPa 15th
Max Change in 24 hours: 29.3 hPa 14th
 
Radiation Daily Mean: 18.10 MJ/m
Max Daily Value: 29.50 MJ/m 16th
Min Daily Value: 5.66 MJ/m 14th
Number of Days with Data: 31 Days
1-Hour Maximum: 1160 W/m 23rd 
Starting Time of the Hour: 14:00
 
Max Dewpoint: 13.8C 30th
Min Dewpoint: -0.1C 1st
Mean Dewpoint: 7.2C
 
Max Humidity: 99% 18th
Min Humidity: 37% 2nd 
Mean Humidity: 77%
Weather Data for Otter Valley, Devon. May 2013
  Temp oC Grass Hum (%) Soil oC DP (oC) Wind (mph) Rain Air (hPa) W/m UV Sun Frost Calm Wind Sea Observations
  Min Max Min Min Max 30 100 Min Max Max Ave Run mm Min Max Max Max Hours Hours Hours Chill Temp
1 0.9 18.3 -0.5 39 94 12.1 11.4 -0.1 5.3 16 3.1 73 0.0 1022 1025 920 5.3 13.9 0.0 1.5 0.4 9.4 Sunny all day
2 4.6 19.9 2.6 37 91 12.4 11.5 3.1 7.1 15 2.5 60 0.0 1022 1024 988 5.8 12.2 0.0 3.0 3.6 10.2 Sunny intervals all day
3 3.6 16.7 1.7 55 97 12.6 11.6 2.4 9.5 13 2.8 68 0.0 1020 1023 791 6.1 5.8 0.0 1.3 2.3 9.6 Sunny intervals all day
4 6.9 18.3 3.4 45 94 12.8 11.7 4.9 10.2 23 4.3 104 0.0 1017 1020 947 5.7 9.1 0.0 2.0 6.8 10.0 Cloudy am, sunny pm
5 11.1 18.7 3.4 61 88 13.6 11.9 7.6 11.7 17 3.5 84 0.0 1021 1023 933 6.0 11.2 0.0 4.8 10.9 10.5 Sunny intervals am, sunny pm
6 3.7 17.8 2.4 66 98 14.1 12.2 2.7 12.4 13 2.0 49 0.0 1018 1022 959 5.9 11.1 0.0 10.8 3.4 12.3 Misty am, sunny pm
7 4.7 18.4 10.4 53 97 14.1 12.3 4.0 10.0 17 2.9 70 0.0 1010 1018 920 5.4 11.1 0.0 7.0 4.5 10.3 Sunny intervals all day
8 10.9 15.2 3.0 64 97 14.1 12.7 5.0 12.3 28 6.6 158 10.1 1003 1010 447 4.9 2.3 0.0 0.0 9.6 10.5 Cloudy am, sunny intervals pm
9 6.2 13.7 3.4 69 93 13.5 12.8 4.6 9.4 37 9.6 229 1.9 1005 1011 708 6.0 3.4 0.0 1.8 5.5 10.6 Sunny intervals all day
10 9.4 15.7 2.8 65 92 13.4 12.8 7.0 11.5 21 5.3 128 0.8 1006 1014 464 3.7 1.1 0.0 0.5 9.1 10.6 Sunny ints all day, showers pm
11 5.8 14.4 1.7 62 98 13.2 12.9 5.0 10.2 22 4.1 99 3.2 1011 1014 758 6.4 1.7 0.0 2.5 5.2 10.5 Brief sunny intervals all day
12 4.0 14.0 5.0 74 98 13.1 12.7 3.0 11.0 21 3.1 76 0.0 1014 1018 478 2.8 1.9 0.0 5.3 3.9 10.3 Cloudy with light drizzle
13 9.4 14.7 4.0 56 88 13.2 12.9 4.7 10.4 20 5.0 120 0.2 1012 1016 882 6.7 2.4 0.0 0.0 9.0 10.4 Sunny intervals all day
14 6.5 9.9 2.0 73 96 12.7 12.8 4.9 8.9 30 4.2 101 12.0 983 1013 256 2.3 0.2 0.0 2.5 4.5 10.2 Rain all day. Windy pm.
15 4.4 13.2 0.4 66 97 12.5 12.7 3.3 8.4 22 5.2 125 3.2 982 1001 806 5.4 5.3 0.0 0.0 1.7 10.4 Sunny intervals all day
16 2.3 15.1 7.8 58 98 12.9 12.7 1.3 9.7 18 2.3 54 0.0 999 1002 992 5.8 14.6 0.0 7.5 2.1 11.3 Sunny all day
17 1.3 17.0 0.2 58 98 13.0 12.7 0.6 10.2 11 1.4 34 1.7 999 1009 1134 5.8 6.8 0.0 5.5 1.2 10.9 Sunny am, showers pm
18 3.6 19.2 2.5 40 99 13.1 12.6 2.2 9.7 16 2.6 62 0.0 1007 1010 986 5.4 13.5 0.0 4.3 3.1 10.7 Sunny all day
19 7.4 18.4 5.6 59 94 13.6 12.7 5.8 12.0 14 2.1 51 0.0 1008 1014 501 3.3 2.4 0.0 1.0 7.3 10.9 Cloudy am, hazy sun pm
20 7.3 17.7 4.7 70 96 13.8 12.9 6.1 12.8 14 3.3 86 0.0 1013 1015 590 5.5 4.8 0.0 0.3 6.1 10.7 Sunny intervals all day
21 10.6 17.2 8.1 74 96 14.0 13.0 8.8 12.8 16 3.1 74 0.0 1015 1020 721 7.1 2.3 0.0 4.8 10.4 10.8 Cloudy am, sunny intervals pm
22 6.7 18.1 5.1 51 97 14.1 13.0 3.6 9.9 24 4.4 107 0.0 1019 1021 920 7.5 7.4 0.0 2.5 6.3 10.6 Sunny intervals all day
23 6.5 14.3 3.4 48 92 14.0 13.0 1.5 6.0 29 6.4 153 0.0 1015 1020 1160 6.4 8.7 0.0 0.3 5.6 10.4 Sunny intervals all day
24 6.3 14.2 3.2 54 86 13.8 13.2 1.7 7.2 25 5.8 127 0.8 1011 1016 804 7.5 4.5 0.0 0.0 4.8 10.3 Sunny intervals all day
25 3.4 16.9 1.0 55 95 13.6 13.2 1.9 9.0 18 3.6 86 0.0 1015 1023 1084 6.4 10.9 0.0 2.3 3.1 11.1 Sunny intervals all day
26 2.2 17.9 0.8 46 97 13.7 13.2 1.1 8.9 18 3.4 81 0.0 1016 1023 973 6.3 14.8 0.0 4.3 0.8 11.1 Sunny all day
27 2.8 14.3 0.8 74 98 14.0 13.3 1.7 9.9 30 6.2 148 2.5 1002 1016 896 7.2 5.2 0.0 8.0 2.4 11.1 Sunny ints am, cloudy pm.
28 7.6 12.3 7.0 77 97 13.8 13.4 6.8 9.8 19 2.8 68 12.0 1000 1002 311 2.2 0.0 0.0 2.3 6.5 11.3 Bright am, cloudy pm.
29 8.1 16.9 8.0 63 96 13.8 13.4 7.0 11.8 15 1.8 43 2.1 1001 1009 860 7.3 3.1 0.0 7.3 7.9 12.4 Sunny intervals all day
30 10.1 21.9 5.8 58 98 14.4 13.4 9.2 13.8 19 3.1 75 0.0 1009 1015 1050 7.0 6.8 0.0 6.8 9.8 11.2 Sunny intervals all day
31 7.8 23.7 5.9 50 98 14.6 13.3 7.0 13.8 18 2.6 64 0.0 1015 1021 1002 7.2 13.9 0.0 6.3 7.6 12.0 Sunny intervals all day
6.0 16.6 3.7 59 95 13.4 12.7 4.1 10.2 20 3.8 2854 50 1009 1016 814 5.7 213 0.0 100 5.3 10.7  
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