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Weather & Climate in Westerham, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Westerham 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 381 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 | 381 ft (116 m) |
| Area | 73.3 sq mi (189.7 km²) |
| Population Density | 45/sq mi |
| Coordinates | 51.2663°N, 0.0689°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 | 69 km | 10 km |
| Oct 6, 1999 | 34 km NNW of Fécamp, France | M4.6 | 135 km | 1 km |
| Feb 15, 1994 | 7 km ESE of Thetford, United Kingdom | M4.4 | 135 km | 10 km |
| Jan 23, 2007 | 57 km ENE of Broadstairs, United Kingdom | M4.1 | 149 km | 10 km |
| Dec 14, 1991 | 3 km SSE of Longfossé, France | M4.0 | 142 km | 10 km |
| Sep 15, 1994 | 38 km NE of Broadstairs, United Kingdom | M3.9 | 126 km | 10 km |
| Jul 14, 2011 | 62 km SSE of Ventnor, United Kingdom | M3.9 | 140 km | 10 km |
| Jan 27, 1998 | 27 km W of Le Touquet-Paris-Plage, France | M3.8 | 116 km | 2 km |
| May 12, 1994 | 4 km S of Shipston on Stour, United Kingdom | M3.7 | 144 km | 10 km |
| May 22, 2015 | 3 km SSE of Ramsgate, United Kingdom | M3.7 | 95 km | 12 km |
| Jan 27, 1992 | 6 km SSE of Longfossé, France | M3.5 | 145 km | 10 km |
| Mar 3, 2009 | 1 km ENE of Hawkinge, United Kingdom | M3.5 | 79 km | 4 km |
| Feb 17, 1992 | 1 km W of Warboys, United Kingdom | M3.4 | 127 km | 10 km |
| Feb 27, 2019 | 3 km SE of Dorking, United Kingdom | M3.3 | 26 km | 10 km |
| Sep 9, 1995 | 0 km WNW of East Wittering, United Kingdom | M3.3 | 86 km | 10 km |
| Feb 13, 1997 | 26 km W of Le Touquet-Paris-Plage, France | M3.2 | 116 km | 5 km |
| May 4, 1990 | 0 km NE of Coquelles, France | M3.1 | 127 km | 10 km |
| Aug 26, 2002 | 40 km NNW of Étretat, France | M3.0 | 136 km | 4 km |
| May 1, 1997 | 21 km W of Fort-Mahon-Plage, France | M3.0 | 133 km | 5 km |
| Nov 25, 1998 | 26 km N of Grand-Fort-Philippe, France | M3.0 | 140 km | 10 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 | - | 111 km |
| 1911 | FOLKSTONE, ENGLAND | Meteorological | 0.9 m | - | 84 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 3.2 in | Wettest |
| February | 39°F (4°C) | 2.1 in | Coldest |
| March | 43°F (6°C) | 2.3 in | |
| April | 46°F (8°C) | 2.0 in | |
| May | 52°F (11°C) | 2.0 in | |
| June | 57°F (14°C) | 2.2 in | |
| July | 64°F (18°C) | 1.8 in | Warmest, Driest |
| August | 61°F (16°C) | 2.1 in | |
| September | 57°F (14°C) | 2.6 in | |
| October | 51°F (10°C) | 3.0 in | |
| November | 44°F (7°C) | 3.2 in | |
| December | 41°F (5°C) | 3.1 in |
Westerham has a seasonal temperature swing of 25°F / from 39°F in February to 64°F in July. Total annual precipitation is 29.5 inches, with January being the wettest month (3.2") and July the driest (1.8").