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Weather & Climate in Portesham, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Portesham 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 272 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 35.2 inches. The city sits at an elevation of 246 feet.
Temperature
41°F Jan (5°C)
61°F Jul (16°C)
| Annual Average | 50.1°F |
| 7% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 272 days/yr |
Geography
| Elevation | 246 ft (75 m) |
| Area | 7.1 sq mi (18.5 km²) |
| Population Density | 79/sq mi |
| Coordinates | 50.6707°N, 2.5639°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
36 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 | 148 km | 12 km |
| Feb 20, 2014 | 17 km NNW of Ilfracombe, United Kingdom | M4.1 | 136 km | 3 km |
| Jul 14, 2011 | 62 km SSE of Ventnor, United Kingdom | M3.9 | 143 km | 10 km |
| Jan 29, 2004 | 2 km E of North Petherton, United Kingdom | M3.7 | 55 km | 7 km |
| Jan 29, 2004 | 2 km E of North Petherton, United Kingdom | M3.6 | 55 km | 7 km |
| Jan 1, 1994 | Wales-England region, United Kingdom | M3.6 | 91 km | 10 km |
| Aug 17, 1995 | 28 km S of Salcombe, United Kingdom | M3.6 | 116 km | 10 km |
| Feb 12, 2002 | 1 km SSE of Deri, United Kingdom | M3.5 | 124 km | 8 km |
| Oct 10, 2001 | 2 km SSE of Caerphilly, United Kingdom | M3.5 | 108 km | 10 km |
| Feb 24, 2023 | 1 km ENE of Brynmawr, United Kingdom | M3.4 | 133 km | 10 km |
| Jun 20, 2002 | 3 km N of Marshfield, United Kingdom | M3.4 | 106 km | 14 km |
| Sep 23, 1992 | 1 km NNE of Tiverton, United Kingdom | M3.3 | 70 km | 10 km |
| Jul 30, 1999 | 2 km ENE of Bargoed, United Kingdom | M3.3 | 122 km | 6 km |
| Sep 9, 1995 | 0 km WNW of East Wittering, United Kingdom | M3.3 | 119 km | 10 km |
| Jan 29, 2004 | 2 km E of North Petherton, United Kingdom | M3.3 | 55 km | 7 km |
| Oct 16, 1997 | 4 km ENE of Torquay, United Kingdom | M3.2 | 67 km | 10 km |
| May 19, 2019 | 7 km ESE of Swanage, United Kingdom | M3.0 | 51 km | 10 km |
| Jan 28, 2002 | 1 km S of Abercarn, United Kingdom | M3.0 | 114 km | 10 km |
| Nov 26, 1991 | 50 km N of Urville-Nacqueville, France | M3.0 | 86 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 | — | 36 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 4.1 in | Wettest |
| February | 41°F (5°C) | 3.1 in | Coldest |
| March | 44°F (6°C) | 2.8 in | |
| April | 46°F (8°C) | 2.3 in | |
| May | 52°F (11°C) | 2.3 in | |
| June | 57°F (14°C) | 2.2 in | |
| July | 61°F (16°C) | 2.1 in | Driest |
| August | 61°F (16°C) | 2.5 in | Warmest |
| September | 57°F (14°C) | 2.8 in | |
| October | 52°F (11°C) | 3.5 in | |
| November | 46°F (8°C) | 3.4 in | |
| December | 43°F (6°C) | 4.0 in |
Portesham has a seasonal temperature swing of 20°F / from 41°F in February to 61°F in August. Total annual precipitation is 35.2 inches, with January being the wettest month (4.1") and July the driest (2.1").