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uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
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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 |
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