Summary for June 2009

Continuing a trend since the beginning of March of months warmer and sunnier
than average.

Apart from a short changeable spell from the 6th to the 10th, this June was
predominantly settled and warm and increasingly sunny. Overall rainfall was
above the LTA but 38.7 mm of the 53.9 mm total fell in just one afternoon on
the 6th. Just 15.2 mm fell during the following 23 days, all from
thunderstorms. Conditions at the end of the month were very dry.

The month started sunny with 65 hours of sunshine during the first week
(1st - 7th) alone. Sunshine levels were then a little lower, but still
reasonable during the 2nd and 3rd weeks before climbing again in the 4th
week with 59 hours (24th - 30th). This month did not end up as sunny as June
2008 (233 hours) but was much sunnier than 2007 (157 hours).

As would be expected, the warmth followed the sunshine with a short, cool
spell from the 6th to the 8th. Otherwise, daytime temperatures have been
consistently high with only 5 days failing to exceed the LTA. This month had
20 days with a temperature greater than 20°C, the highest since 2006 (21
days).

Warmer than 2005, 2007 and 2008, and only slightly cooler than 2006 (mean
16.7°C).

30 cm soil temperatures reached 19.0°C on the 30th, higher than anything
recorded during the summers of 2007 & 2008.

The anomalies given in brackets are experimental and are adjusted to
represent 1970 - 2000.

Mean Max: 21.8ºC (+2.2ºC)
Mean Min: 11.0ºC (+0.2ºC)
Mean: 16.4ºC (+1.2ºC)

High Max: 28.5ºC 3rd
Low Max: 14.4ºC 6th
High Min: 16.1ºC 26th
Low Min: 5.6ºC 8th
Grass Min: 3.1ºC 8th

Rain Total (gauge): 53.9 mm (131%)
Rain Total (tipping bucket): 52.2 mm (127%)
Rain Days 0.2 mm: 7 Days
Rain Days 1.0 mm: 5 Days
Max 24 hrs: 38.7 mm 6th
Days without any rain: 23

Ground Frost: 0 Days
Thunder Heard: 5 Days
Hail 5 mm: 0 Days
Hail 5 mm: 0 Days
Fog @ 9am: 0 Days

Total Monthly Sunshine: 220.8 Hours
Most Sunshine in a Day: 15h:37m 2nd
Average Daily Sunshine: 07h:21m
Sunless Days: 1 Day
Cloudless Days: 4 Days
Total Possible Sunshine: 492h:41m
Percentage of Total Sun: 45%

Mean Soil Temp @ 30 cm: 16.6ºC
Mean Soil Temp @ 100 cm: 13.9ºC

Mean 10 Min Wind 39 mph: 0.0 Days
Calm: 3.81 Days
Mean Wind: 3.1 mph
Max Gust: 22 mph 6th

Mean Cloud Cover: 58%
Mean RH @ 9am: 80%
Rain Duration 0.1mm/hour: 18.0 Hours

Mean Pressure @ 9am: 1017.2 hPa (-0.2 hPa)
Mean Pressu 1016.9 hPa (-0.5 hPa)
Max Pressu 1028.4 hPa 23rd
Min Pressu 997.0 hPa 7th

Max Dewpoint: 17.8ºC 30th
Min Dewpoint: 2.4ºC 8th
Mean Dewpoint: 10.0ºC

Max Humidity: 91% 7th
Min Humidity: 35% 2nd
Mean Humidity: 70% (-6)
________________
Nick.
Otter Valley, Devon
83 m amsl
http://www.ottervalley.co.uk