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Weather & Climate in Glastonbury, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Glastonbury experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 40°F in January while summers reach 60°F in July. The area gets 223 sunny days per year, above the national average. Annual precipitation totals 43.6 inches. The area receives 4.1 inches of snow annually. The city sits at an elevation of 43 feet.
Temperature
40°F Jan (4°C)
60°F Jul (16°C)
| Annual Average | 51.4°F |
| 5% below US avg | |
| January Average | 40°F (4°C) |
| July Average | 60°F (16°C) |
| Sunny Days | 223 days/yr |
Geography
| Elevation | 43 ft (13 m) |
| Area | 1,596.6 sq mi (4,135.2 km²) |
| Population Density | 5/sq mi |
| Coordinates | 51.1475°N, 2.7208°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
40 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Apr 2, 1990 | 4 km NNE of Presteigne, United Kingdom | M4.7 | 131 km | 18 km |
| Oct 25, 1999 | 10 km N of Hirwaun, United Kingdom | M4.5 | 95 km | 10 km |
| Feb 17, 2018 | 5 km NE of Clydach, United Kingdom | M4.3 | 101 km | 12 km |
| Feb 20, 2014 | 17 km NNW of Ilfracombe, United Kingdom | M4.1 | 103 km | 3 km |
| May 31, 2001 | 20 km NNW of Flexbury, United Kingdom | M4.0 | 138 km | 29 km |
| Sep 23, 2000 | 1 km WSW of Warwick, United Kingdom | M4.0 | 147 km | 13 km |
| May 12, 1994 | 4 km S of Shipston on Stour, United Kingdom | M3.7 | 123 km | 10 km |
| Jan 29, 2004 | 2 km E of North Petherton, United Kingdom | M3.7 | 19 km | 7 km |
| Aug 17, 1995 | 28 km S of Salcombe, United Kingdom | M3.6 | 150 km | 10 km |
| Jan 1, 1994 | Wales-England region, United Kingdom | M3.6 | 51 km | 10 km |
| Jan 29, 2004 | 2 km E of North Petherton, United Kingdom | M3.6 | 19 km | 7 km |
| Feb 12, 2002 | 1 km SSE of Deri, United Kingdom | M3.5 | 72 km | 8 km |
| Oct 10, 2001 | 2 km SSE of Caerphilly, United Kingdom | M3.5 | 56 km | 10 km |
| Jun 20, 2002 | 3 km N of Marshfield, United Kingdom | M3.4 | 53 km | 14 km |
| Feb 24, 2023 | 1 km ENE of Brynmawr, United Kingdom | M3.4 | 79 km | 10 km |
| Sep 23, 1992 | 1 km NNE of Tiverton, United Kingdom | M3.3 | 59 km | 10 km |
| Jun 16, 1991 | 11 km WSW of Knighton, United Kingdom | M3.3 | 134 km | 10 km |
| Jul 30, 1999 | 2 km ENE of Bargoed, United Kingdom | M3.3 | 69 km | 6 km |
| Sep 9, 1995 | 0 km WNW of East Wittering, United Kingdom | M3.3 | 135 km | 10 km |
| Jan 29, 2004 | 2 km E of North Petherton, United Kingdom | M3.3 | 19 km | 7 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 | — | 75 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (4°C) | 3.3 in | Coldest |
| February | 41°F (5°C) | 2.4 in | |
| March | 44°F (7°C) | 2.4 in | |
| April | 47°F (8°C) | 2.0 in | Driest |
| May | 53°F (12°C) | 2.1 in | |
| June | 58°F (15°C) | 2.4 in | |
| July | 60°F (16°C) | 2.1 in | |
| August | 62°F (16°C) | 2.5 in | Warmest |
| September | 57°F (14°C) | 2.8 in | |
| October | 52°F (11°C) | 2.9 in | |
| November | 46°F (8°C) | 3.1 in | |
| December | 43°F (6°C) | 3.5 in | Wettest |
Glastonbury has a seasonal temperature swing of 22°F / from 40°F in January to 62°F in August. Total annual precipitation is 31.5 inches, with December being the wettest month (3.5") and April the driest (2.0").