Summer 2008

Moonlight reflections in Lyme Bay, Sidmouth on a still, clear July evening.
Moonlight reflections off the sea looking south towards Start Point.

A very disappointing summer overall though June was dry and reasonably sunny. July & August were very wet and often cloudy. There were only a few brief settled spells in what was a very unsettled summer.

Summary for  Summer 2008
Mean Max: 20.5ºC (+0.0ºC)
Mean Min: 12.1ºC (+0.6ºC)
Mean: 16.3ºC (+0.3ºC)
     
High Max: 27.4ºC 9th June
Low Max: 15.4ºC 16th Aug
High Min: 17.2ºC 30th Aug
Low Min: 5.1ºC 17th Jun
Mean Grass Min: 10.8ºC  
Grass Min: 2.6ºC 16th Jun
     
Rain Total (gauge): 271.1 mm (208%)
Rain Total (tipping bucket): 297.3 mm (228%)
Rain Days >0.2 mm: 48 Days  
Rain Days >1.0 mm: 36 Days  
Max 24 hrs: 26.9 mm 12th Aug
Days without any rain: 42  
     
Air Frost: 0 Days  
Ground Frost: 0 Days  
Snow Falling: 0 Days  
Snow (50%) @ 9am: 0 Days  
Thunder Heard: 3 Days  
Hail <5 mm: 0 Days  
Hail >5 mm: 0 Days  
Fog @ 9am: 0 Days  
     
Total Monthly Sunshine: 539h:16m  
Total Monthly Sunshine: 540.2 Hours  
Most Sunshine in a Day: 14h:56m 27th Jul
Average Daily Sunshine: 05h:55m  
Sunless Days: 4 Days  
Cloudless Days: 6 Days  
Total Possible Sunshine: 1435h:42m  
Percentage of Total Sun: 38%  
     
Mean Soil Temp @ 30 cm: 16.0ºC  
Min Soil Temp @ 30 cm: 14.2ºC 18th Jun
Max Soil Temp @ 30 cm: 18.8ºC 28th Jul
Mean Soil Temp @ 100 cm: 14.6ºC  
Min Soil Temp @ 100 cm: 13.3ºC 1st Jun
Max Soil Temp @ 100 cm: 16.0ºC 28th Jul
     
Mean 10 Min Wind >39 mph: 0.4 Days  
N: 1.99 Days  
NE: 1.61 Days  
E: 4.36 Days  
SE: 10.71 Days  
S: 19.60 Days  
SW: 13.15 Days  
W: 21.11 Days  
NW: 13.89 Days  
Calm: 13.40 Days  
Mean Wind: 4 mph  
Max Gust: 35 mph 5th Jul
     
Mean Cloud Cover: 63%  
Rain Duration >0.1mm/hour: 131.0 Hours  
Frost Duration: 0.0 Hours  
Max Frost Duration in a Day: 0.0 Hours  
     
Mean Sea Temperature: 16.4ºC  
Normal for Month:    
Max Sea Temperature: 18.9ºC 7th Aug
Min Sea Temperature: 13.5ºC 3rd Jun
     
Mean Pressure: 1013.7 hPa (-3.8 hPa)
Max Pressure: 1027.6 hPa 22nd Jul
Min Pressure: 986.6 hPa 12th Aug
     
Max Dewpoint: 17.0ºC 28th Jul
Min Dewpoint: 1.6ºC 17th Jun
Mean Dewpoint: 10.8ºC  
     
Max Humidity: 100% 6th Aug
Min Humidity: 37% 27th Jul
Mean Humidity: 75% (-2)

This summer ended up slightly above average temperature wise despite the often cool and cloudy conditions. The warmest days came in the 2nd half of July but the hottest day of the summer was in June. The hottest day of the year did not occur in summer but back in spring during May with a maximum temperature of 27.9°C on the 11th.

June was a drier than average month (30.9 mm) but July and August both had very high rainfall with 113 & 127 mm of rain respectively.
There were only 3 days when thunder was heard. As expected during the summer months there were no grass or air frosts.
Sunshine levels were above normal in June and below normal in July. August was a very dull month with a daily average of only 3.9 hours' sunshine. This represents about half the amount of sunshine that would normally be expected making this August one of the dullest since 1912.
Soil temperatures were variable due to the high rainfall and unsettled nature of this summer.
Westerly winds were dominant for much of the summer with only brief anticyclonic spells. It was also very windy at times, especially during the first two weeks of July.
The lack of sunshine for this summer is shown by the high amount of cloud cover (63%).
Sea temperatures remained around average for much of the summer but ended up slightly below during the latter part of August.
Mean pressure was below normal and indicative of the very unsettled nature of this summer, especially during July & August.
Dewpoints did not reach levels normally expected during summer and show the lack of any really warm, humid days.
Relative humidity was slightly below normal.
Graphs for Summer 2008
 

Figure 1. Temperature and Rainfall for Summer 2008.
Figure 2. Sunshine, air pressure and mean wind speed for Summer 2008.
Figure 3. Wind direction for Summer 2008.
Figure 4. Sea Surface Temperature (SST) for Lyme Bay for Summer 2008.
Figure 5. Wind run, gusts and air pressure for Summer 2008.