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Otter Valley Weather Extremes (2005 - 2015)

My beautiful wife Cila, stood on Mushroom Rock, Dartmoor on a warm and humid September day with dramatic skies.

Otter Valley weather extremes for 2015 and station records

Previous extremes 2009 2010 2011 2012 2013 2014  
    2015    Station Record
Temperature highs    25.3C 8th August   30.8C 19th July 2006
Temperature lows   -3.9C 23rd January   -9.8C 26th December 2010
Temperature lowest high   5.6C 2nd February   -0.9C 25th December 2010
Temperature highest low   19.2C 1st July   19.2C 1st July 2015
             
Warmest monthly mean   16.7C July   20.1C  July 2006
Coldest monthly mean    6.3C February   0.7C December 2010
Warmest annual mean   11.6C     12.1C 2014
Coldest annual mean         10.0C 2010
             
Highest monthly anomaly   +5.0C December   +5.0C December 2015

Lowest monthly anomaly

  -1.0C September   -5.6C December 2010
             
Grass temp lows   -6.8C 2nd February   -10.8C 7th January 2010
             
Rainfall in 15 minutes   - mm -   10.4 mm 30th October 2008
Rainfall in 1 hour   - mm -   24.1 mm 12th June 2006
Rainfall in 24 hours   36.8 mm 23rd August   70.8 mm 30th October 2008
Rainfall in 1 month   78.1 mm May   188.9 mm November 2009
Rainfall in 1 year   - mm -   1370 mm 2012
             
Driest Month   14.4 mm April   9.8 mm September 2014
Driest Year   776 mm 2015   712 mm 2011
             
Max Sunshine in 1 day   15.4 Hours 30th June   15.8 hours 25th June 2010
Max Sunshine in 1 month   256.8 Hours June   328.2 hours July 2013
Max Sunshine in 1 year   1831 Hours     2019 hours 2010
Dullest month   49.1 Hours November   49.1 Hours  November 2015
Dullest Year   - -   1681 Hours  2011
             
UV Index high   9.3 16th July   10.0 14th July 2014
Solar irradiance high   1320 W/m 4th May   1320 W/m 4th May 2015
Solar energy high   30.0 MJ/m 15th June   33.1 MJ/m 19th June 2012
             
Wind high   50 mph 30th December   58 mph 10th March 2008
Windiest day   390 miles 26th December   405 miles 6th February 2016
Windiest month   6632 miles December   6632 miles December 2015
Calmest day    12 miles 2nd October   1 mile 11th December 2008
Calmest month   2246 miles September   1293 miles September 2014
             
Pressure highs   1042.2 hPa 18th February   1042.6 hPa 29th December 2014
Pressure lows   976.1 hPa 30th January   961.1 hPa 10th March 2008
             
Dewpoint high   20.6C 20th July   20.9C 19th August 2012
Dewpoint low   -4.9C 23rd January   -14.3C 26th December 2010
Relative humidity low   39% 7th June   27% 9th July 2013
             
30 cm soil temp highs   19.6C 16th July   21.3C 27th July 2014
30 cm soil temp lows   5.2C 7th February   0.3C 8th January 2009
100 cm soil temp highs   18.3C 16th July   19.6C 30th July 2014
100 cm soil temp lows   8.4C 11th February   4.0C 10th January 2009
             
Highest snow depth   0 cm No snow lying    28 cm 20th December 2010
Longest snow cover1   0 days No snow lying    10 days 17th - 26th Dec 2010
Least snow days in a year2   0 days No snow falling    0 days 2007, 11, 12, 14 & 15
Most snow days in a year2   0 days No snow falling    4 days 2009 & 2010
             
Sea surface temp highs   18.3C 8th August   22.5C 10th August 2003
Sea surface temp lows   7.0C 8th February   5.4C 27th December 2010
             
Least frost days   - -   18 days 2014
Most frost days   23 days 2015   64 days 2010
Frostiest day3   14.3 hours 2nd February   24 hours 25th December 2010
Frostiest month3   109.5 hours February   373 hours December 2010
Thunder days in a month4   5 Days July   6 days July 2014
Thunder days in a year4   11 Days 2015   23 days 2014
 

Updated on the 1st January 2016.
This page is usually updated at the end of every month.

 

Most records go back to May 2005, which is when this station started recording weather for the Otter Valley. Sea surface temperature records are for Lyme Bay and date from early 2003. Sunshine recording was added late 2006 and started collecting data in 2007. Soil and grass temperature readings started in 2007. UV Index recording started in January 2011. 1Longest continuous snow cover of at least 50% of the ground. 2Snow days are defined as snow seen falling. 3Frostiest days are defined as the time duration with temperatures below 0.0C. 4Thunder days are defined as days when thunder is heard.

Webcam Gallery World Weather Month So Far Year So Far Met Office 5 Day Sea Temp UV Light Recording Data Humidity Calcs