August 2020

The enchanted Blackator Down, Dartmoor on a warm and humid August day

A rather remarkable month. Warm, very wet with around average sunshine. The climatology belies a month of contrasts with drought conditions prevailing until the 19th then torrential, thundery downpours replenished the parched countryside. Extremely high DPs from the 6th to the 18th with a peak DP of 23.8C, easily breaking the previous station record of 21.8C. Warmest August in my record (2005), wettest since 2015 (151 mm) and the dullest since 2018 (193 hours)

Summary for August 2020
Mean Max: 22.9C (+2.2C)
Mean Min: 13.6C (+0.7C)
Mean: 18.3C (+1.5C)
High Max: 31.3C 11th
Low Max: 18.2C 27th
High Min: 19.0C 14th
Low Min: 7.1C 31st
Mean Grass Min: 11.2C  
Grass Min: 5.0C 29th
Days  >25C 7 Days  
Days >20C 27 Days  
Nights  >15C 15 Days  
Nights  <10C 6 Days  
Rain Total (gauge): 99.4 mm (175%)
Rain Total (tipping bucket): 100.6 mm (177%)
Rain Days >0.2 mm: 17 Days  
Rain Days >1.0 mm: 13 Days  
Max 24 hrs: 28.4 mm 19th
Days without any rain: 14  
Air Frost: 0 Days  
Grass Frost: 0 Days  
Snow Falling: 0 Days  
Snow (50%) @ 9am: 0 Days  
Ice Days: 0 Days  
Thunder Heard: 5 Days  
Hail <5 mm: 0 Days  
Hail >5 mm: 0 Days  
Fog @ 9am: 0 Days  
Total Monthly Sunshine: 201.3 Hours (103%)
Most Sunshine in a Day: 14.2 Hours 8th
Average Daily Sunshine: 6.5 Hours  
Sunless Days: 2 Days  
Cloudless Days: 3 Days  
Total Possible Sunshine: 447.8 Hours  
Percentage of Total Sun: 45%  
Average Sunny Interval: 19.4 mins
Maximum UV Index: 7.9 5th
Mean Soil Temp @ 10 cm: 18.5C  
Min Soil Temp @ 10 cm: 16.0C 31st
Max Soil Temp @ 10 cm: 20.7C 12th
Mean Soil Temp @ 30 cm: 18.1C  
Min Soil Temp @ 30 cm: 16.4C 31st
Max Soil Temp @ 30 cm: 19.4C 15th
Mean Soil Temp @ 100 cm: 16.7C  
Min Soil Temp @ 100 cm: 16.1C 6th
Max Soil Temp @ 100 cm: 17.2C 17th
Ave 10 Min Wind >39 mph: 0.00 Days  
N: 6.01 Days 19%
NE: 1.99 Days 6%
E: 0.36 Days 1%
SE: 1.04 Days 3%
S: 4.28 Days 14%
SW: 5.11 Days 16%
W: 1.94 Days 6%
NW: 3.04 Days 10%
Calm: 7.23 Days 23%
Wind Chill Low: 6.8C 30th
Mean Wind: 3.7 mph  
Max Gust: 54 mph 21st
Mean Cloud Cover: 42%  
Mean RH @ 9am: 93%  
Rain >0.1mm/hour: 22.8 Hours  
Frost Duration: 0.0 Hours  
Air Frost in a Day: 0.0 Hours 1st
Mean Sea Temperature: 18.1C (+0.1C)
Normal for Month: 18.0C  
Max Sea Temperature: 21.5C 11th
Min Sea Temperature: 16.5C 4th
Mean Pressure @ 9am: 1012.1 hPa  
Mean Pressure: 1012.0 hPa  
Max Pressure: 1021.6 hPa 30th
Min Pressure: 994.5 hPa 20th
Max Change in 24 hours: 16.2 hPa 27th
Radiation Daily Mean: 15.43 MJ/m  
Max Daily Value: 25.23 MJ/m 9th
Min Daily Value: 4.46 MJ/m 15th
Number of Days with Data: 31 Days  
1-Hour Maximum: 827 W/m 3rd 
Starting Time of the Hour:   13:00
Max Dewpoint: 23.9C 11th
Min Dewpoint: 6.2C 30th
Mean Dewpoint: 15.3C  
Max Humidity: 99% 7th
Min Humidity: 46% 3rd 
Mean Humidity: 83%  
 
Weather Data for Otter Valley, Devon. August 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 11.2 22.0 9.4 62 98 18.3 18.0 16.1 10.9 10.5 17.3 16 2.4 58 0.0 1012 1018 1123 7.1 6.4 0.0 17.6 Sunny intervals all day
2 10.3 21.1 7.2 71 97 17.7 17.7 16.1 11.4 9.3 17.4 16 1.8 42 1.6 1016 1019 964 7.6 4.3 0.0 17.3 Sunny intervals all day
3 8.3 23.1 6.1 46 98 17.2 17.4 16.1 19.2 7.7 14.1 19 3.0 71 0.0 1017 1018 979 7.7 12.0 0.0 17.0 Sunny intervals all day
4 7.4 21.0 5.6 67 97 17.0 17.1 16.1 21.9 6.6 15.6 24 4.3 103 0.0 1014 1019 916 7.5 6.1 0.0 16.9 Sunny intervals all day
5 16.6 20.4 15.0 87 98 17.5 17.2 16.1 21.0 15.0 18.8 30 6.3 152 1.6 1011 1014 922 7.9 1.0 0.0 16.8 Sunny intervals all day
6 17.2 21.4 13.9 88 98 17.9 17.2 16.1 20.3 16.5 19.7 16 2.2 52 0.6 1012 1017 445 4.9 4.2 0.0 17.6 Sunny intervals all day
7 11.3 26.8 9.4 58 99 17.8 17.8 16.1 23.8 10.7 21.6 13 0.6 15 0.0 1016 1018 782 6.4 8.2 0.0 17.6 Sunny intervals all day
8 15.3 30.3 15.6 57 97 19.6 18.0 16.1 9.7 14.6 23.0 15 4.0 97 0.0 1018 1020 809 7.1 14.2 0.0 17.9 Sunny all day
9 15.1 28.6 11.7 61 98 19.2 18.3 16.1 11.2 14.4 21.2 15 3.5 85 0.0 1015 1019 707 6.7 14.1 0.0 18.2 Sunny all day
10 16.9 25.8 15.0 74 96 19.4 18.3 16.5 0.0 15.9 21.4 18 3.2 76 0.0 1012 1015 775 6.0 7.9 0.0 18.0 Sunny intervals all day
11 16.8 31.3 13.9 61 98 19.7 18.6 16.7 0.0 16.0 23.9 14 2.9 71 0.0 1012 1015 807 6.9 11.8 0.0 19.3 Sunny intervals all day
12 16.8 30.2 15.0 55 97 20.7 19.0 16.7 35.4 16.0 21.6 18 1.6 39 0.0 1010 1013 731 6.8 11.7 0.0 19.5 Sunny intervals all day
13 17.2 28.1 14.4 66 97 20.5 19.4 16.7 26.9 16.1 22.0 18 1.4 33 4.4 1010 1012 844 7.6 8.0 0.0 20.3 Sunny intervals all day
14 19.0 21.9 18.3 86 97 20.2 19.4 16.8 5.2 18.0 19.8 11 0.9 20 1.4 1012 1014 344 3.9 0.0 0.0 20.0 Cloudy all day
15 18.1 20.1 17.2 92 96 19.8 19.4 17.2 4.0 17.1 19.1 5 0.2 4 0.4 1013 1015 241 2.6 0.2 0.0 20.1 Brief sunny int am, cloudy pm
16 17.4 20.1 11.1 84 97 19.5 19.1 17.2 2.4 13.7 18.0 7 0.3 7 0.4 1009 1013 359 3.3 0.6 0.0 19.8 Brief sunny intervals
17 11.8 22.5 9.4 79 98 18.7 18.9 17.2 1.2 10.9 19.0 16 2.0 48 3.2 1007 1009 868 6.4 4.4 0.0 19.6 Sunny intervals all day
18 12.6 23.5 10.0 82 98 19.1 18.9 17.2 3.7 11.9 20.8 24 4.0 95 1.8 1007 1009 913 7.0 8.1 0.0 19.3 Showers am, sunny ints pm
19 16.4 19.3 12.2 95 98 19.2 18.9 17.2 3.0 15.0 18.7 30 4.9 117 28.4 995 1008 228 2.8 0.0 0.0 18.6 Heavy rain am, cloudy pm
20 12.4 22.4 15.0 75 98 19.4 18.3 17.2 0.0 11.4 18.6 33 6.6 159 1.4 995 1002 773 6.9 8.2 0.0 18.6 Sunny intervals all day
21 17.1 21.4 13.9 76 95 18.9 18.5 17.2 0.0 14.4 17.5 54 15.6 374 0.6 995 1007 675 6.9 2.2 0.0 17.8 Sunny intervals all day
22 12.8 22.1 8.9 62 96 18.4 18.3 17.2 0.0 11.7 17.4 28 5.4 129 2.0 1007 1015 802 7.0 7.1 0.0 17.5 Sunny intervals all day
23 15.2 19.4 11.7 69 91 18.2 18.3 17.2 0.0 11.6 15.0 18 3.7 88 0.0 1015 1020 522 5.6 2.7 0.0 17.4 Sunny intervals all day
24 12.9 22.2 10.6 77 97 18.2 18.1 17.2 0.0 11.5 18.5 24 3.3 78 4.0 1012 1019 839 6.1 4.1 0.0 17.5 Sunny intervals all day
25 15.6 22.7 15.0 67 98 18.6 18.3 17.2 0.0 13.8 17.6 38 11.1 266 18.4 997 1012 882 7.0 3.8 0.0 17.2 Sunny intervals all day
26 14.6 23.0 10.0 56 91 18.3 18.2 17.2 0.0 12.2 15.5 27 5.5 131 0.0 1004 1019 916 7.1 8.8 0.0 17.1 Sunny intervals all day
27 10.3 18.2 8.3 83 98 17.6 18.0 17.2 0.0 9.4 16.3 18 1.8 44 25.2 1003 1019 607 4.1 3.7 0.0 17.0 Rain am, thunderstorms pm
28 9.9 20.8 7.2 69 98 17.1 17.4 17.1 0.0 9.3 16.2 19 2.2 53 5.2 1000 1005 846 5.4 5.9 0.0 17.1 Sunny ints am, thunder pm
29 8.3 19.4 5.0 54 94 16.6 17.0 16.7 0.0 6.8 12.1 23 4.7 118 0.0 1005 1015 888 5.9 8.2 0.0 16.8 Sunny intervals all day
30 9.3 20.2 6.7 50 97 16.1 16.7 16.7 0.0 6.2 11.7 16 2.3 83 0.0 1015 1022 796 6.1 12.9 0.0 16.9 Sunny all day
31 7.1 21.0 5.0 55 90 16.0 16.4 16.7 0.0 10.0 13.3 16 3.7 39 0.0 1020 1022 737 5.6 10.5 0.0 18.1 Sunny intervals all day
13.6 22.9 11.2 70 97 18.5 18.1 16.7 7.5 12.4 18.2 21 3.7 2748 100.6 1009 1015 743 6.1 201.3 0.0 18.1  
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