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.
| Temperature and Humidity | ||
| Highest Temperature | 36.8 °C | at 15:39 on 24 August 2016 |
| Lowest Temperature | -14.6 °C | at 07:16 on 11 February 2012 |
| Highest Dew Point | 22.1 °C | at 07:56 on 04 July 2015 |
| Lowest Dew Point | -27.1 °C | at 18:55 on 13 December 2017 |
| Highest Apparent Temperature | 38.6 °C | at 15:39 on 24 August 2016 |
| 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 | 38.1 °C | at 16:52 on 01 July 2015 |
| Highest Minimum | 18.2 °C | at 00:49 on 06 September 2016 |
| 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 | 26.1 °C | on 19 April 2018 |
| 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 | 119.1 mm | November 2012 |
| Longest Dry Period | 19 days | to 22 July 2013 |
| 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) | 1046.0 hPa | at 20:13 on 27 December 2016 |
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Page updated 23/05/2019 17:00:00
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