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Weather & Climate in Welwyn Garden City, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Welwyn Garden City experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 40°F in January while summers reach 62°F in July. The area gets 225 sunny days per year, above the national average. Annual precipitation totals 30.7 inches. The area receives 4.5 inches of snow annually. The city sits at an elevation of 302 feet.
Temperature
40°F Jan (5°C)
62°F Jul (17°C)
| Annual Average | 51.8°F |
| 4% below US avg | |
| January Average | 40°F (5°C) |
| July Average | 62°F (17°C) |
| Sunny Days | 225 days/yr |
Geography
| Elevation | 302 ft (92 m) |
| Area | 62.4 sq mi (161.7 km²) |
| Population Density | 960/sq mi |
| Coordinates | 51.8017°N, 0.2069°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
34 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Apr 28, 2007 | 1 km WNW of Lympne, United Kingdom | M4.6 | 116 km | 10 km |
| Feb 15, 1994 | 7 km ESE of Thetford, United Kingdom | M4.4 | 96 km | 10 km |
| Oct 28, 2001 | 5 km E of Long Clawson, United Kingdom | M4.2 | 124 km | 12 km |
| Sep 23, 2000 | 1 km WSW of Warwick, United Kingdom | M4.0 | 110 km | 13 km |
| Sep 15, 1994 | 38 km NE of Broadstairs, United Kingdom | M3.9 | 139 km | 10 km |
| Jan 28, 2015 | 2 km WSW of Market Overton, United Kingdom | M3.8 | 109 km | 3 km |
| May 22, 2015 | 3 km SSE of Ramsgate, United Kingdom | M3.7 | 127 km | 12 km |
| May 12, 1994 | 4 km S of Shipston on Stour, United Kingdom | M3.7 | 101 km | 10 km |
| Mar 3, 2009 | 1 km ENE of Hawkinge, United Kingdom | M3.5 | 123 km | 4 km |
| Apr 18, 2014 | 3 km WSW of Market Overton, United Kingdom | M3.5 | 108 km | 2 km |
| Feb 17, 1992 | 1 km W of Warboys, United Kingdom | M3.4 | 67 km | 10 km |
| Jan 21, 1999 | 4 km ENE of Old Leake, United Kingdom | M3.3 | 140 km | 10 km |
| Sep 9, 1995 | 0 km WNW of East Wittering, United Kingdom | M3.3 | 124 km | 10 km |
| Feb 27, 2019 | 3 km SE of Dorking, United Kingdom | M3.3 | 66 km | 10 km |
| Feb 21, 2022 | 5 km N of Hockley, United Kingdom | M3.2 | 144 km | 10 km |
| Nov 5, 1994 | 5 km N of Debenham, United Kingdom | M3.0 | 109 km | 5 km |
| Mar 18, 2001 | 8 km W of Marlborough, United Kingdom | M2.9 | 120 km | 10 km |
| Jul 16, 2005 | 3 km WSW of Southwater, United Kingdom | M2.9 | 89 km | 5 km |
| Jan 18, 2013 | 0 km NE of Hathern, United Kingdom | M2.9 | 132 km | 13 km |
| Jan 27, 2015 | 1 km ENE of Winchester, United Kingdom | M2.9 | 111 km | 3 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 0.9 m (3 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1911 | FOLKSTONE, ENGLAND | Meteorological | 0.9 m | — | 127 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (5°C) | 2.6 in | |
| February | 39°F (4°C) | 1.7 in | Coldest |
| March | 43°F (6°C) | 2.0 in | |
| April | 46°F (8°C) | 1.9 in | |
| May | 53°F (11°C) | 1.9 in | |
| June | 58°F (14°C) | 2.2 in | |
| July | 62°F (17°C) | 1.7 in | Warmest, Driest |
| August | 62°F (17°C) | 2.1 in | |
| September | 57°F (14°C) | 2.3 in | |
| October | 51°F (10°C) | 2.6 in | Wettest |
| November | 44°F (7°C) | 2.5 in | |
| December | 41°F (5°C) | 2.5 in |
Welwyn Garden City has a seasonal temperature swing of 23°F / from 39°F in February to 62°F in July. Total annual precipitation is 26.0 inches, with October being the wettest month (2.6") and July the driest (1.7").