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Weather & Climate in Radlett, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Radlett experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 41°F in January while summers reach 63°F in July. The area gets 223 sunny days per year, above the national average. Annual precipitation totals 33.6 inches. The area receives 2.7 inches of snow annually. The city sits at an elevation of 243 feet.
Temperature
41°F Jan (5°C)
63°F Jul (17°C)
| Annual Average | 53.0°F |
| 2% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 63°F (17°C) |
| Sunny Days | 223 days/yr |
Geography
| Elevation | 243 ft (74 m) |
| Area | 49.5 sq mi (128.1 km²) |
| Population Density | 165/sq mi |
| Coordinates | 51.6859°N, 0.3187°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
32 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 | 114 km | 10 km |
| Feb 15, 1994 | 7 km ESE of Thetford, United Kingdom | M4.4 | 111 km | 10 km |
| Oct 28, 2001 | 5 km E of Long Clawson, United Kingdom | M4.2 | 134 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 | 145 km | 10 km |
| Jan 28, 2015 | 2 km WSW of Market Overton, United Kingdom | M3.8 | 119 km | 3 km |
| May 12, 1994 | 4 km S of Shipston on Stour, United Kingdom | M3.7 | 97 km | 10 km |
| May 22, 2015 | 3 km SSE of Ramsgate, United Kingdom | M3.7 | 129 km | 12 km |
| Mar 3, 2009 | 1 km ENE of Hawkinge, United Kingdom | M3.5 | 122 km | 4 km |
| Apr 18, 2014 | 3 km WSW of Market Overton, United Kingdom | M3.5 | 119 km | 2 km |
| Feb 17, 1992 | 1 km W of Warboys, United Kingdom | M3.4 | 81 km | 10 km |
| Sep 9, 1995 | 0 km WNW of East Wittering, United Kingdom | M3.3 | 109 km | 10 km |
| Feb 27, 2019 | 3 km SE of Dorking, United Kingdom | M3.3 | 53 km | 10 km |
| Feb 21, 2022 | 5 km N of Hockley, United Kingdom | M3.2 | 146 km | 10 km |
| Nov 5, 1994 | 5 km N of Debenham, United Kingdom | M3.0 | 122 km | 5 km |
| Mar 18, 2001 | 8 km W of Marlborough, United Kingdom | M2.9 | 109 km | 10 km |
| Jan 1, 1995 | 2 km ESE of Halesworth, United Kingdom | M2.9 | 147 km | 10 km |
| Feb 15, 1994 | 4 km NNE of Banham, United Kingdom | M2.9 | 130 km | 10 km |
| Jul 16, 2005 | 3 km WSW of Southwater, United Kingdom | M2.9 | 76 km | 5 km |
| Jan 18, 2013 | 0 km NE of Hathern, United Kingdom | M2.9 | 139 km | 13 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 | - | 126 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°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 | 63°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 |
Radlett has a seasonal temperature swing of 24°F / from 39°F in February to 63°F in July. Total annual precipitation is 26.0 inches, with October being the wettest month (2.6") and July the driest (1.7").