April 2018
A dramatic orange-red April sky over the Otter Valley

A mild, wet and very dull month.
Summary for April 2018
Mean Max: 14.8ºC (+1.6ºC)
Mean Min: 7.2ºC (+2.2ºC)
Mean (min+max ÷ 2): 11.0ºC (+1.9ºC)
Mean (integrated):  10.5ºC  
High Max: 25.2ºC 19th
Low Max: 9.0ºC 1st
High Min: 11.1ºC 18th
Low Min: 0.8ºC 5th
Mean Grass Min: 5.0ºC  
Grass Min: -2.2ºC 5th
Days  >15°C 11 Days  
Days >10°C 29 Days  
Nights  >10°C 3 Days  
Nights  >5°C 24 Days  
Rain Total (gauge): 81.6 mm (134%)
Rain Total (tipping bucket): 77.2 mm (127%)
Rain Days >0.2 mm: 13 Days  
Rain Days >1.0 mm: 11 Days  
Max 24 hrs: 12.4 mm 10th
Days without any rain: 17  
Air Frost: 0 Days  
Grass Frost: 1 Day 5th
Snow Falling: 0 Days  
Snow (50%) @ 9am: 0 Days  
Ice Days: 0 Days  
Thunder Heard: 1 Day 21st
Hail <5 mm: 0 Days  
Hail >5 mm: 0 Days  
Fog @ 9am: 1 Day 14th
Total Monthly Sunshine: 128.8 Hours (65%)
Most Sunshine in a Day: 13.2 Hours 19th
Average Daily Sunshine: 4.3 Hours  
Sunless Days: 4 Days  
Cloudless Days: 3 Days  
Total Possible Sunshine: 415.1 Hours  
Percentage of Total Sun: 31%  
Average Sunny Interval: 15.0 mins
Maximum UV Index: 5.2 19th
Mean Soil Temp @ 10 cm: 11.0ºC  
Min Soil Temp @ 10 cm: 7.5ºC 1st
Max Soil Temp @ 10 cm: 13.5ºC 22nd 
Mean Soil Temp @ 30 cm: 10.6ºC  
Min Soil Temp @ 30 cm: 7.3ºC 1st
Max Soil Temp @ 30 cm: 12.8ºC 22nd 
Mean Soil Temp @ 100 cm: 9.5ºC  
Min Soil Temp @ 100 cm: 7.8ºC 1st
Max Soil Temp @ 100 cm: 11.1ºC 25th
Ave 10 Min Wind >39 mph: 0.00 Days  
N: 3.94 Days 13%
NE: 1.59 Days 5%
E: 1.97 Days 6%
SE: 3.54 Days 11%
S: 5.87 Days 19%
SW: 1.91 Days 6%
W: 2.41 Days 8%
NW: 4.55 Days 15%
Calm: 4.22 Days 14%
Wind Chill Low: 0.4ºC 5th
Mean Wind: 4.0 mph  
Max Gust: 32 mph 16th
Mean Cloud Cover: 66%  
Mean RH @ 9am: 89%  
Rain >0.1mm/hour: 26.4 Hours  
Frost Duration: 0.0 Hours  
Air Frost in a Day: 0.0 Hours 1st
Mean Sea Temperature: 9.4ºC (-0.9ºC)
Normal for Month: 10.3ºC  
Max Sea Temperature: 12.9ºC 19th
Min Sea Temperature: 7.5ºC 1st
Mean Pressure @ 9am: 1009.6 hPa  
Mean Pressure: 1009.4 hPa  
Max Pressure: 1025.6 hPa 18th
Min Pressure: 986.5 hPa 4th
Max Change in 24 hours: 16.0 hPa 5th
Radiation Daily Mean: 12.71 MJ/m²  
Max Daily Value: 23.23 MJ/m² 19th
Min Daily Value: 3.60 MJ/m² 9th
Number of Days with Data: 30 Days  
1-Hour Maximum: 827 W/m² 11th
Starting Time of the Hour:   13:00
Max Dewpoint: 16.4ºC 19th
Min Dewpoint: -0.3ºC 5th
Mean Dewpoint: 8.1ºC  
Max Humidity: 99% 14th
Min Humidity: 45% 19th
Mean Humidity: 83%  
 
 
 

Weather Data for Otter Valley, Devon. April 2018 
  Temp oC Grass Hum (%) Soil oC (cm) Soil DP (oC) Wind (mph) Rain Air (hPa) W/m² 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 4.9 9.0 3.9 67 94 7.5 7.3 7.8 2.0 2.4 4.6 22 2.9 70 9.0 1006 1012 625 2.9 0.1 0.0 7.6 Brief sunny intervals all day
2 8.1 11.6 5.0 92 97 8.1 7.8 7.8 1.4 4.8 10.5 27 7.1 171 11.0 992 1006 336 2.2 0.0 0.0 7.7 Cloudy all day
3 9.1 13.6 6.7 81 98 9.3 8.4 7.8 1.0 7.7 11.4 27 8.2 197 6.0 990 993 933 3.6 6.4 0.0 8.0 Sunny intervals all day
4 8.8 14.1 5.6 72 97 9.5 8.9 7.9 1.0 5.2 10.6 23 6.9 166 3.4 987 1001 854 3.7 0.9 0.0 8.1 Brief sunny intervals all day
5 0.8 10.9 -2.2 64 96 9.0 9.0 8.3 1.0 -0.3 5.5 18 3.3 79 0.0 1001 1017 814 3.8 9.2 0.0 8.2 Sunny intervals all day
6 7.9 12.1 5.6 78 90 9.1 8.9 8.3 1.6 4.9 8.8 18 6.2 148 0.0 1005 1015 744 3.6 3.8 0.0 8.2 Sunny ints am, cloudy pm
7 7.1 13.1 3.9 80 98 9.6 9.0 8.3 2.0 5.9 11.1 15 2.2 54 4.4 1001 1008 617 2.9 1.0 0.0 8.5 Sunny intervals all day
8 3.8 14.5 0.6 71 98 9.7 9.3 8.3 1.0 2.7 10.4 11 1.4 34 0.0 1007 1009 720 2.2 2.3 0.0 8.7 Cloudy am, sunny ints pm
9 7.9 11.3 5.0 88 98 9.8 9.4 8.7 1.0 6.6 10.2 10 1.7 42 4.0 998 1009 257 1.8 0.0 0.0 8.3 Cloudy all day
10 9.0 13.5 8.9 85 98 10.0 9.4 8.9 1.0 8.6 11.3 22 4.0 95 12.4 995 1003 448 2.4 0.3 0.0 8.5 Brief sunny intervals all day
11 9.1 16.3 6.7 68 97 10.7 10.0 8.9 1.0 7.6 11.9 12 3.2 76 3.4 1003 1006 979 4.0 5.4 0.0 8.7 Sunny intervals all day
12 6.0 17.0 2.8 65 97 11.0 10.4 8.9 1.0 5.1 10.7 13 2.5 60 0.0 1002 1005 814 3.9 9.9 0.0 8.9 Sunny intervals all day
13 8.2 12.4 7.8 79 94 11.2 10.6 9.0 1.0 7.1 10.1 13 1.3 31 0.0 1003 1012 455 2.6 0.1 0.0 9.0 Brief sunny intervals all day
14 5.3 11.9 2.2 84 99 11.0 10.6 9.4 1.9 4.4 9.8 14 1.5 36 0.0 1012 1016 843 4.0 2.8 0.0 9.1 Sea fog am, sunny ints pm
15 8.1 13.1 7.8 88 98 11.0 10.6 9.4 2.0 7.5 11.6 24 5.7 136 4.0 1004 1014 863 4.8 1.0 0.0 9.2 Rain am, sunny intervals pm
16 4.7 14.3 1.1 72 98 10.9 10.6 9.4 2.0 3.9 11.4 32 6.1 146 0.0 1006 1014 1044 4.9 5.5 0.0 9.4 Sunny intervals all day
17 10.4 12.5 8.9 84 98 11.1 10.7 9.4 2.0 8.1 11.0 30 10.3 247 6.0 1014 1021 397 2.2 0.0 0.0 9.6 Cloudy am, rain pm
18 11.1 18.8 9.4 63 98 11.7 11.1 9.6 2.0 9.3 13.7 25 6.8 163 0.0 1021 1026 807 4.9 13.1 0.0 9.8 Sunny all day
19 5.5 25.2 3.9 45 98 12.4 11.5 10.0 2.0 4.6 16.4 18 2.4 59 0.0 1021 1023 822 5.2 13.2 0.0 11.0 Sunny all day
20 9.8 24.3 8.3 47 96 13.3 12.2 10.0 2.0 8.9 15.3 12 3.0 73 0.0 1022 1024 839 5.0 13.1 0.0 10.6 Sunny all day
21 7.6 20.9 6.1 62 97 13.4 12.6 10.1 1.9 6.7 15.5 15 2.5 59 1.0 1012 1023 853 4.9 7.4 0.0 10.3 Sun and thundery showers
22 7.8 19.0 5.6 65 97 13.5 12.8 10.6 1.4 6.8 14.5 18 2.4 59 0.0 1009 1013 892 5.1 8.7 0.0 10.4 Sunny intervals all day
23 6.6 16.8 2.8 57 94 13.0 12.7 10.6 1.4 5.1 10.1 19 3.2 77 0.0 1013 1018 847 4.6 1.1 0.0 10.3 Brief sunny intervals all day
24 10.3 15.4 8.3 81 95 13.1 12.8 10.7 1.9 8.7 12.8 30 5.4 130 0.0 1009 1017 568 4.2 0.3 0.0 10.4 Brief sunny intervals all day
25 7.6 16.5 3.9 53 95 12.8 12.6 11.1 1.9 4.7 11.2 23 3.2 77 0.6 1010 1015 1085 5.2 5.7 0.0 10.5 Sunny intervals all day
26 5.7 16.5 1.7 48 91 12.2 12.2 11.1 2.0 3.9 9.2 22 3.3 78 0.0 1015 1018 1102 5.2 5.9 0.0 10.6 Sunny intervals all day
27 7.6 12.5 6.7 80 95 12.0 12.1 11.1 2.3 6.0 11.0 16 3.1 74 12.0 1001 1015 557 3.0 0.5 0.0 10.5 Rain am, sunny ints pm
28 8.1 11.9 7.2 70 92 11.9 11.7 11.1 2.0 6.4 8.2 12 1.5 37 0.0 1004 1012 350 2.2 0.0 0.0 10.4 Cloudy all day
29 4.1 11.2 1.1 72 97 11.4 11.7 11.1 2.0 3.0 6.8 17 2.7 68 0.0 1010 1012 681 4.1 1.8 0.0 10.3 Brief sunny intervals all day
30 4.9 13.9 3.3 49 84 10.8 11.3 11.1 1.4 1.2 4.2 24 5.1 117 0.0 1009 1011 731 3.8 9.2 0.0 10.2 Sunny intervals all day
7.2 14.8 5.0 70 96 11.0 10.6 9.5 1.6 5.6 10.7 19 4.0 2859 77.2 1006 1013 729 3.8 128.8 0.0 9.4  
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