Welwyn weather

 Latitude N 51° 48' 00"    Longitude W 00° 11' 00"    Elevation 250 ft

Records began on 28 December 2011. Here are the extremes recorded since then.

Records Since 28 December 2011
Temperature and Humidity
Highest Temperature 39.5 °C at 14:57 on 25 July 2019
Lowest Temperature -14.6 °C at 07:16 on 11 February 2012
Highest Dew Point 23.9 °C at 19:38 on 25 July 2019
Lowest Dew Point -27.1 °C at 18:55 on 13 December 2017
Highest Apparent Temperature 40.9 °C at 14:44 on 25 July 2019
Lowest Apparent Temperature -18.2 °C at 07:16 on 11 February 2012
Lowest Wind Chill Temperature -14.6 °C at 07:16 on 11 February 2012
Highest Heat Index 40.3 °C at 13:36 on 25 July 2019
Highest Minimum 19.0 °C at 06:07 on 26 July 2019
Lowest Maximum -1.4 °C at 12:30 on 16 January 2013
Highest Humidity 100 % at 05:55 on 05 January 2015
Lowest Humidity 11 % at 16:00 on 06 August 2018
Highest Daily Range 27.1 °C on 07 August 2020
Lowest Daily Range 0.4 °C on 14 January 2016
Rainfall
Highest Rain Rate 79.2 mm/hr at 12:23 on 18 November 2012
Highest Hourly Rainfall 516.3 mm at 19:39 on 23 August 2016
Highest Daily Rainfall 36.0 mm on 24 August 2015
Highest Monthly Rainfall 140.4 mm August 2020
Longest Dry Period 32 days to 04 June 2020
Longest Wet Period 21 days to 03 January 2013
Wind
Highest Wind Gust 38.6 mph at 03:13 on 27 December 2014
Highest Wind Speed Average 23.0 mph at 16:22 on 25 January 2014
Highest Daily Wind Run 231.4 miles on 05 March 2012
Pressure
Lowest Pressure (sl) 961.6 hPa at 16:20 on 14 December 2012
Highest Pressure (sl) 1047.7 hPa at 22:58 on 19 January 2020
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