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Otter Valley Weather Extremes (2005 - 2016)

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

Otter Valley weather extremes for 2016 and station records

Previous extremes 2009 2010 2011 2012 2013 2014 2015
    2016    Station Record
Temperature highs    27.2°C 19th July   30.8°C 19th July 2006
Temperature lows   -4.6°C 16th January   -11.6°C 26th December 2010
Temperature lowest high   6.0°C 1st December   -0.9°C 25th December 2010
Temperature highest low   18.4°C 6th Sept   19.2°C 1st July 2015
             
Warmest monthly mean   18.1°C August   20.1°C  July 2006
Coldest monthly mean   6.6°C February   0.7°C December 2010
Warmest annual mean   11.7°C 2016   12.1°C 2014
Coldest annual mean         10.0°C 2010
             
Highest monthly anomaly   +2.0°C December   +5.0°C December 2015

Lowest monthly anomaly

  -0.6°C March   -5.6°C December 2010
             
Grass temp lows   -6.1°C 2nd December   -10.8°C 7th January 2010
             
Rainfall in 15 minutes   7.0 mm 15th June   10.4 mm 30th October 2008
Rainfall in 1 hour   14.0 mm 17th June   24.1 mm 12th June 2006
Rainfall in 24 hours   45.8 mm 21st November   70.8 mm 30th October 2008
Rainfall in 1 month   144.8 mm November   188.9 mm November 2009
Rainfall in 1 year   798 mm 2016   1370 mm 2012
             
Driest Month   5.9 mm July   5.9 mm July 2016
Driest Year   - -   712 mm 2011
             
Max Sunshine in 1 day   15.2 Hours 18th July   15.8 hours 25th June 2010
Max Sunshine in 1 month   241.6 Hours August   328.2 hours July 2013
Max Sunshine in 1 year   1890 Hours 2016   2019 hours 2010
Dullest month   65.0 Hours December   49.1 Hours  November 2015
Dullest Year   - -   1681 Hours  2011
             
UV Index high   10.0 16th July   10.0 14th July 2014
Solar irradiance high   1238 W/m² 18th May   1320 W/m² 4th May 2015
Solar energy high   29.46 MJ/m² 29th May   33.1 MJ/m² 19th June 2012
             
Wind high   50 mph 28th March   58 mph 10th March 2008
Windiest day   405 miles 6th February   405 miles 6th February 2016
Windiest month   4343 miles January   6632 miles December 2015
Calmest day    3 miles 29th October   1 mile 11th December 2008
Calmest month   1973 miles October   1293 miles September 2014
             
Pressure highs   1043.9 hPa 27th December   1043.9 hPa 27th December 2016
Pressure lows   968.8 hPa 20th Nov   961.1 hPa 10th March 2008
             
Dewpoint high   21.5°C 5th Sept   21.5°C 5th September 2016
Dewpoint low   -5.6°C 16th February   -14.3°C 26th December 2010
Relative humidity low   38% 30th April   27% 9th July 2013
             
30 cm soil temp highs   20.7°C 20th July   21.3°C 27th July 2014
30 cm soil temp lows   7.1°C 19th February   0.3°C 8th January 2009
100 cm soil temp highs   19.2°C 24th July   19.6°C 30th July 2014
100 cm soil temp lows   9.9°C 14th March   4.0°C 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 & 16
Most snow days in a year2   0 days No snow falling    4 days 2009 & 2010
             
Sea surface temp highs   20.4°C 18th July   22.5°C 10th August 2003
Sea surface temp lows   8.4°C 9th March   5.4°C 27th December 2010
             
Least frost days   - -   18 days 2014
Most frost days   40 days 2016   64 days 2010
Frostiest day3   15.6 hours 1st December   24 hours 25th December 2010
Frostiest month3   77.9 hours February   373 hours December 2010
Thunder days in a month4   5 Days June   6 days July 2014
Thunder days in a year4   16 Days 2016   23 days 2014
 

Updated on the 1st January 2017.

 

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 0.0°C. 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