July 2008

Otter Valley Barley Field
An Otter Valley barley field on a warm and breezy July day.
Summary for  July 2008
Mean Max: 21.1C (-0.2C)
Mean Min: 12.6C (+0.4C)
Mean: 16.9C (+0.1C)
     
High Max: 27.1C 28th
Low Max: 17.3C 9th
High Min: 17.1C 25th
Low Min: 7.7C 4th
Mean Grass Min: 11.4C  
Grass Min: 6.1C 4th
     
Rain Total (gauge): 112.9 mm (277%)
Rain Total (tipping bucket): 98.6 mm  
Rain Days >0.2 mm: 15 Days  
Rain Days >1.0 mm: 11 Days  
Max 24 hrs: 31.9 mm 9th
Days without any rain: 16  
     
Air Frost: 0 Days  
Ground Frost: 0 Days  
Snow Falling: 0 Days  
Snow (50%) @ 9am: 0 Days  
Thunder Heard: 0 Days  
Hail <5 mm: 0 Days  
Hail >5 mm: 0 Days  
Fog @ 9am: 1 Day  
     
Total Monthly Sunshine: 188h:06m  
Total Monthly Sunshine: 187.8 Hours  
Most Sunshine in a Day: 14h:56m 27th
Average Daily Sunshine: 06h:04m  
Sunless Days: 1 Days  
Cloudless Days: 3 Days  
Total Possible Sunshine: 494h:50m  
Percentage of Total Sun: 38%  
     
Mean Soil Temp @ 30 cm: 16.5C  
Min Soil Temp @ 30 cm: 15.1C 7th
Max Soil Temp @ 30 cm: 18.8C 28th
Mean Soil Temp @ 100 cm: 14.8C  
Min Soil Temp @ 100 cm: 14.2C 7th
Max Soil Temp @ 100 cm: 16.0C 28th
     
Mean 10 Min Wind >39 mph: 0.0 Days  
N: 0.40 Days  
NE: 0.90 Days  
E: 2.72 Days  
SE: 4.55 Days  
S: 6.27 Days  
SW: 3.02 Days  
W: 6.95 Days  
NW: 4.54 Days  
Calm: 4.50 Days  
Mean Wind: 5 mph  
Max Gust: 35 mph 5th
     
Mean Cloud Cover: 62%  
Mean RH @ 9am: 84%  
Rain Duration >0.1mm/hour: 50.0 Hours  
Frost Duration: 0.0 Hours  
Max Frost Duration in a Day: 0.0 Hours  
     
Mean Sea Temperature: 16.7C  
Normal for Month:    
Max Sea Temperature: 18.7C 27th
Min Sea Temperature: 15.8C 9th
     
Mean Pressure @ 9am: 1013.7 hPa (-4.1 hPa)
Mean Pressure: 1013.5 hPa (-4.3 hPa)
Max Pressure: 1027.6 hPa 22nd
Min Pressure: 995.9 hPa 7th
     
Max Dewpoint: 17.0C 28th
Min Dewpoint: 3.8C 4th
Mean Dewpoint: 11.1C  
     
Max Humidity: 92% 9th
Min Humidity: 37% 27th
Mean Humidity: 74% (-2)

 

A month of two halves.

The first half was very wet (90.8 mm); cool (mean 15.6C); cloudy (72 hours of sun). Whilst the second half was drier (22.1 mm); warmer (mean 18.1C); sunnier (116 hours of sun). The last week of the month had a run of very warm nights for this location. Night time temperatures were warmer than normal but daytime temperatures were slightly below making the monthly mean just 0.1C above the LTA. Overall a warmer, sunnier but wetter month than the dismal July of last year.

Rainfall was exceptional! Most of which fell on two separate occasions leaving 16 days with no rain at all.
As usual in a summer month there were no air or grass frosts. No thunder was recorded which is unusual for a summer month.
Sunshine levels were below average for July, especially during the first 2 weeks.
Soil temperatures remained around normal throughout.
Winds were all over the place, from all directions except the north. This shows what a cyclonic month this July was.
For such a wet month it was actually raining for only 50 hours.
Sea temperatures rose gradually throughout the month and on the whole were around average or slightly above.
Mean pressure was was -4.3 hPa below normal and indicative of the generally unsettled nature of this month dominated by low pressure systems.
Dewpoints were generally quite low until the end of the month.
With a mean relative humidity of 74%, this was 2 percentage points below normal.
Weather Data for Otter Valley, Devon.  July 2008  
  Temp (oC) Hum (RH%) Dewpoint (oC) Wind (mph) Rain Pressure (hPa) Grass Sun  
  Min Max Ave Min Max Ave Min Max Ave Max Ave Run mm Min Max Ave Min Hours Observations
1 12.3 22.5 17.4 57 88 73 8.0 14.0 11.0 21 5.4 129 0.4 1008 1019 1014 8.4 8.9 Sunny, rain evening
2 10.9 19.6 15.3 70 91 81 7.9 14.0 11.0 22 4.8 115 2.8 1007 1009 1008 9.6 4.4 Sunny intervals all day
3 12.0 19.6 15.8 55 90 73 8.6 12.0 10.3 19 4.8 114 5.8 1006 1014 1010 11.2 13.2 Sunny intervals all day
4 7.7 18.6 13.2 62 90 76 3.8 11.1 7.5 30 5.3 127 1.8 1009 1015 1012 6.1 3.1 Sunny intervals all day
5 13.1 17.8 15.5 73 91 82 10.1 13.1 11.6 35 11.1 266 14.0 1004 1009 1006 12.9 5.2 Sunny am, rain pm
6 13.2 19.3 16.3 70 91 81 9.5 13.2 11.4 25 6.6 159 11.6 999 1005 1002 12.7 1.2 Sunshine & showers all day
7 12.7 18.3 15.5 67 91 79 9.0 12.7 10.9 24 6.2 149 5.6 996 1003 1000 12.9 3.0 Showers then sunny ints
8 12.2 18.3 15.3 61 84 73 8.0 10.5 9.3 20 5.3 128 0.0 1003 1013 1008 11.1 4.4 Sunny intervals all day
9 13.2 17.3 15.3 72 92 82 8.7 14.6 11.7 20 4.9 118 24.8 1007 1014 1010 11.8 0.0 Rain all day
10 12.3 19.0 15.7 68 91 80 9.8 13.4 11.6 24 5.4 131 0.0 1005 1008 1007 10.8 2.9 Sunny intervals all day
11 10.6 20.3 15.5 64 91 78 7.5 13.1 10.3 20 4.2 102 5.2 1004 1008 1006 10.1 5.0 Sunshine & showers all day
12 9.2 18.5 13.9 53 89 71 5.9 9.8 7.9 21 4.4 105 0.0 1008 1012 1010 7.9 4.7 Sunny intervals all day
13 9.7 20.8 15.3 57 89 73 5.5 11.9 8.7 13 2.1 50 0.0 1012 1018 1015 8.4 6.4 Sunny intervals all day
14 10.6 19.4 15.0 72 89 81 6.6 14.2 10.4 13 2.4 57 0.0 1018 1025 1022 9.6 1.2 Sunny ints am, cloudy pm
15 16.1 22.8 19.5 61 90 76 12.2 16.2 14.2 18 3.6 86 0.0 1025 1027 1026 15.4 7.8 Sunny intervals all day
16 14.3 21.5 17.9 52 88 70 8.9 12.4 10.7 22 5.3 126 0.4 1022 1026 1024 12.7 7.2 Sunny intervals all day
17 13.4 21.2 17.3 59 84 72 9.0 12.2 10.6 18 4.4 105 0.0 1014 1022 1018 11.8 3.0 Sunny intervals all day
18 13.4 20.8 17.1 70 87 79 9.1 14.5 11.8 16 3.5 84 1.2 1010 1014 1012 11.8 1.1 Sunny ints am, showers pm
19 14.2 19.8 17.0 59 89 74 9.8 12.7 11.3 24 7.3 176 0.6 1008 1015 1011 13.5 8.4 Sunny intervals all day
20 11.2 20.1 15.7 50 88 69 6.2 9.8 8.0 27 4.9 119 0.0 1015 1023 1019 9.3 10.2 Sunny intervals all day
21 9.6 21.2 15.4 50 89 70 5.3 10.2 7.8 20 4.0 96 0.0 1023 1027 1025 8.7 12.6 Sunny all day
22 8.8 23.4 16.1 50 68 59 10.2 13.8 12.0 12 2.1 50 0.0 1025 1028 1026 8.6 6.5 Sunny intervals all day
23 13.2 24.8 19.0 43 90 67 9.3 15.4 12.4 20 4.0 96 0.0 1019 1026 1023 12.2 14.4 Sunny all day
24 16.6 25.3 21.0 44 79 62 10.9 13.8 12.4 23 6.7 160 0.0 1010 1020 1015 14.1 10.8 Sunny am, sunny ints pm
25 17.1 22.8 20.0 54 84 69 10.7 15.8 13.3 19 3.5 85 0.0 1007 1012 1010 16.0 1.9 Sunny intervals all day
26 12.6 26.0 19.3 50 89 70 9.3 15.3 12.3 13 1.8 43 0.0 1012 1017 1015 11.4 11.7 Misty early am then sunny
27 10.7 26.8 18.8 37 87 62 7.0 15.0 11.0 11 1.6 39 0.0 1016 1018 1017 10.2 14.9 Sunny all day
28 13.4 27.1 20.3 45 87 66 9.3 17.0 13.2 22 3.3 80 0.0 1010 1017 1014 11.7 9.0 Sunny am, hazy pm
29 16.1 20.1 18.1 75 89 82 11.9 15.2 13.6 26 5.7 138 3.4 1009 1014 1011 13.1 2.5 Sunny ints & showers
30 15.3 21.1 18.2 77 90 84 12.3 15.0 13.7 23 6.6 159 1.0 1014 1016 1015 14.4 0.9 Sunny ints, mostly cloudy
31 16.4 20.4 18.4 75 91 83 11.8 16.3 14.1 23 5.4 130 9.0 1006 1015 1011 15.3 1.2 Sunny ints am, rain pm
12.6 21.1 16.9 60 88 74 8.8 13.5 11.1 21 4.7 3520 78.6 1011 1016 1014 11.4 187.8  
 
Graphs for July 2008
Figure 1. Temperature and Rainfall for July 2008.
Figure 2. Sunshine, air pressure and mean wind speed for July 2008.
Figure 3. Wind direction for July 2008.
Figure 4. Soil & sea surface temperature (SST) for Lyme Bay for July 2008.
Figure 5. Wind run, maximum gusts and mean pressure for July 2008.