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Weather & Climate in South Mimms, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
South Mimms experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 41°F in January while summers reach 64°F in July. The area gets 234 sunny days per year, above the national average. Annual precipitation totals 31.7 inches. The area receives 3.0 inches of snow annually. The city sits at an elevation of 328 feet.
Temperature
41°F Jan (5°C)
64°F Jul (18°C)
| Annual Average | 53.1°F |
| 2% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 234 days/yr |
Geography
| Elevation | 328 ft (100 m) |
| Area | 39.2 sq mi (101.5 km²) |
| Population Density | 22/sq mi |
| Coordinates | 51.6959°N, 0.2327°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
33 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 | 110 km | 10 km |
| Feb 15, 1994 | 7 km ESE of Thetford, United Kingdom | M4.4 | 106 km | 10 km |
| Oct 28, 2001 | 5 km E of Long Clawson, United Kingdom | M4.2 | 135 km | 12 km |
| Sep 23, 2000 | 1 km WSW of Warwick, United Kingdom | M4.0 | 115 km | 13 km |
| Sep 15, 1994 | 38 km NE of Broadstairs, United Kingdom | M3.9 | 140 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 | 103 km | 10 km |
| May 22, 2015 | 3 km SSE of Ramsgate, United Kingdom | M3.7 | 124 km | 12 km |
| Mar 3, 2009 | 1 km ENE of Hawkinge, United Kingdom | M3.5 | 117 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 | 79 km | 10 km |
| Sep 9, 1995 | 0 km WNW of East Wittering, United Kingdom | M3.3 | 112 km | 10 km |
| Feb 27, 2019 | 3 km SE of Dorking, United Kingdom | M3.3 | 54 km | 10 km |
| Feb 21, 2022 | 5 km N of Hockley, United Kingdom | M3.2 | 149 km | 10 km |
| Nov 5, 1994 | 5 km N of Debenham, United Kingdom | M3.0 | 116 km | 5 km |
| Mar 18, 2001 | 8 km W of Marlborough, United Kingdom | M2.9 | 115 km | 10 km |
| Jan 1, 1995 | 2 km ESE of Halesworth, United Kingdom | M2.9 | 141 km | 10 km |
| Jul 16, 2005 | 3 km WSW of Southwater, United Kingdom | M2.9 | 77 km | 5 km |
| Jan 18, 2013 | 0 km NE of Hathern, United Kingdom | M2.9 | 141 km | 13 km |
| Jan 27, 2015 | 1 km ENE of Winchester, United Kingdom | M2.9 | 101 km | 3 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 6.0 m (20 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1858 | NORTH SEA | Unknown | 6.0 m | — | 148 km |
| 1911 | FOLKSTONE, ENGLAND | Meteorological | 0.9 m | — | 122 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 | 64°F (18°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 |
South Mimms has a seasonal temperature swing of 25°F / from 39°F in February to 64°F in July. Total annual precipitation is 26.0 inches, with October being the wettest month (2.6") and July the driest (1.7").