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Weather & Climate in Merstham, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Merstham 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 308 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 | 308 ft (94 m) |
| Area | 3.6 sq mi (9.4 km²) |
| Population Density | 2,244/sq mi |
| Coordinates | 51.2597°N, 0.1573°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
30 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 | 84 km | 10 km |
| Oct 6, 1999 | 34 km NNW of Fécamp, France | M4.6 | 137 km | 1 km |
| Feb 15, 1994 | 7 km ESE of Thetford, United Kingdom | M4.4 | 142 km | 10 km |
| Sep 15, 1994 | 38 km NE of Broadstairs, United Kingdom | M3.9 | 141 km | 10 km |
| Jul 14, 2011 | 62 km SSE of Ventnor, United Kingdom | M3.9 | 133 km | 10 km |
| Jan 27, 1998 | 27 km W of Le Touquet-Paris-Plage, France | M3.8 | 127 km | 2 km |
| May 12, 1994 | 4 km S of Shipston on Stour, United Kingdom | M3.7 | 132 km | 10 km |
| May 22, 2015 | 3 km SSE of Ramsgate, United Kingdom | M3.7 | 111 km | 12 km |
| Mar 3, 2009 | 1 km ENE of Hawkinge, United Kingdom | M3.5 | 94 km | 4 km |
| Feb 17, 1992 | 1 km W of Warboys, United Kingdom | M3.4 | 127 km | 10 km |
| Sep 9, 1995 | 0 km WNW of East Wittering, United Kingdom | M3.3 | 74 km | 10 km |
| Feb 27, 2019 | 3 km SE of Dorking, United Kingdom | M3.3 | 11 km | 10 km |
| Feb 13, 1997 | 26 km W of Le Touquet-Paris-Plage, France | M3.2 | 127 km | 5 km |
| May 4, 1990 | 0 km NE of Coquelles, France | M3.1 | 142 km | 10 km |
| Aug 26, 2002 | 40 km NNW of Étretat, France | M3.0 | 135 km | 4 km |
| May 19, 2019 | 7 km ESE of Swanage, United Kingdom | M3.0 | 142 km | 10 km |
| May 1, 1997 | 21 km W of Fort-Mahon-Plage, France | M3.0 | 143 km | 5 km |
| Nov 5, 1994 | 5 km N of Debenham, United Kingdom | M3.0 | 146 km | 5 km |
| Jul 16, 2005 | 3 km WSW of Southwater, United Kingdom | M2.9 | 32 km | 5 km |
| Jan 27, 2015 | 1 km ENE of Winchester, United Kingdom | M2.9 | 82 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 | - | 126 km |
| 1911 | FOLKSTONE, ENGLAND | Meteorological | 0.9 m | - | 99 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 | 58°F (14°C) | 2.2 in | |
| July | 64°F (18°C) | 1.7 in | Warmest, Driest |
| August | 62°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) | 3.1 in | |
| December | 41°F (5°C) | 3.2 in |
Merstham has a seasonal temperature swing of 24°F / from 39°F in February to 64°F in July. Total annual precipitation is 29.4 inches, with January being the wettest month (3.2") and July the driest (1.7").