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Weather & Climate in Dorchester, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Dorchester experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 41°F in January while summers reach 61°F in July. The area gets 276 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 33.3 inches. The city sits at an elevation of 180 feet.
Temperature
41°F Jan (5°C)
61°F Jul (16°C)
| Annual Average | 50.4°F |
| 7% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 276 days/yr |
Geography
| Elevation | 180 ft (55 m) |
| Area | 1.9 sq mi (4.9 km²) |
| Population Density | 8,884/sq mi |
| Coordinates | 50.7167°N, 2.4333°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
37 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.
| Oct 25, 1999 | 10 km N of Hirwaun, United Kingdom | M4.5 | 146 km | 10 km |
| Feb 17, 2018 | 5 km NE of Clydach, United Kingdom | M4.3 | 150 km | 12 km |
| Feb 20, 2014 | 17 km NNW of Ilfracombe, United Kingdom | M4.1 | 141 km | 3 km |
| Jul 14, 2011 | 62 km SSE of Ventnor, United Kingdom | M3.9 | 137 km | 10 km |
| Jan 29, 2004 | 2 km E of North Petherton, United Kingdom | M3.7 | 56 km | 7 km |
| Jan 29, 2004 | 2 km E of North Petherton, United Kingdom | M3.6 | 56 km | 7 km |
| Jan 1, 1994 | Wales-England region, United Kingdom | M3.6 | 94 km | 10 km |
| Aug 17, 1995 | 28 km S of Salcombe, United Kingdom | M3.6 | 126 km | 10 km |
| Feb 12, 2002 | 1 km SSE of Deri, United Kingdom | M3.5 | 123 km | 8 km |
| Oct 10, 2001 | 2 km SSE of Caerphilly, United Kingdom | M3.5 | 107 km | 10 km |
| Feb 24, 2023 | 1 km ENE of Brynmawr, United Kingdom | M3.4 | 131 km | 10 km |
| Jun 20, 2002 | 3 km N of Marshfield, United Kingdom | M3.4 | 105 km | 14 km |
| Sep 23, 1992 | 1 km NNE of Tiverton, United Kingdom | M3.3 | 77 km | 10 km |
| Jul 30, 1999 | 2 km ENE of Bargoed, United Kingdom | M3.3 | 121 km | 6 km |
| Sep 9, 1995 | 0 km WNW of East Wittering, United Kingdom | M3.3 | 109 km | 10 km |
| Jan 29, 2004 | 2 km E of North Petherton, United Kingdom | M3.3 | 56 km | 7 km |
| Oct 16, 1997 | 4 km ENE of Torquay, United Kingdom | M3.2 | 78 km | 10 km |
| Jan 28, 2002 | 1 km S of Abercarn, United Kingdom | M3.0 | 113 km | 10 km |
| Nov 26, 1991 | 50 km N of Urville-Nacqueville, France | M3.0 | 83 km | 10 km |
| Jun 17, 1999 | 7 km NNE of Ross on Wye, United Kingdom | M3.0 | 140 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 0.4 m (1 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2011 | PLYMOUTH, ENGLAND | Avalanche | 0.4 m | — | 47 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 3.9 in | Wettest |
| February | 41°F (5°C) | 2.9 in | Coldest |
| March | 44°F (7°C) | 2.7 in | |
| April | 47°F (8°C) | 2.2 in | |
| May | 52°F (11°C) | 2.2 in | |
| June | 57°F (14°C) | 2.1 in | |
| July | 61°F (16°C) | 1.9 in | Driest |
| August | 62°F (16°C) | 2.3 in | Warmest |
| September | 58°F (14°C) | 2.7 in | |
| October | 52°F (11°C) | 3.4 in | |
| November | 46°F (8°C) | 3.3 in | |
| December | 43°F (6°C) | 3.8 in |
Dorchester has a seasonal temperature swing of 21°F / from 41°F in February to 62°F in August. Total annual precipitation is 33.3 inches, with January being the wettest month (3.9") and July the driest (1.9").