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Weather & Climate in Saint Dennis, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Saint Dennis experiences four distinct seasons with an average annual temperature of 51°F (10°C). Winters average 43°F in January while summers reach 60°F in July / relatively mild seasonal variation. The area gets 261 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 41.4 inches. The city sits at an elevation of 551 feet.
Temperature
43°F Jan (6°C)
60°F Jul (16°C)
| Annual Average | 50.7°F |
| 6% below US avg | |
| January Average | 43°F (6°C) |
| July Average | 60°F (16°C) |
| Sunny Days | 261 days/yr |
Geography
| Elevation | 551 ft (168 m) |
| Area | 3,058.0 sq mi (7,920.3 km²) |
| Population Density | 1/sq mi |
| Coordinates | 50.3833°N, 4.8833°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
15 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.1.
| Nov 10, 1996 | 19 km S of St Just, United Kingdom | M4.1 | 72 km | 10 km |
| Feb 20, 2014 | 17 km NNW of Ilfracombe, United Kingdom | M4.1 | 120 km | 3 km |
| May 31, 2001 | 20 km NNW of Flexbury, United Kingdom | M4.0 | 69 km | 29 km |
| Aug 17, 1995 | 28 km S of Salcombe, United Kingdom | M3.6 | 90 km | 10 km |
| Jan 1, 1994 | Wales-England region, United Kingdom | M3.6 | 144 km | 10 km |
| Sep 23, 1992 | 1 km NNE of Tiverton, United Kingdom | M3.3 | 115 km | 10 km |
| Jan 19, 2001 | 53 km S of Mullion, United Kingdom | M3.2 | 93 km | 10 km |
| Oct 16, 1997 | 4 km ENE of Torquay, United Kingdom | M3.2 | 101 km | 10 km |
| Feb 8, 1998 | 18 km SW of Mullion, United Kingdom | M2.9 | 66 km | 5 km |
| Sep 5, 1999 | 15 km WSW of Salcombe, United Kingdom | M2.9 | 70 km | 5 km |
| Mar 23, 2008 | 38 km NW of St Just, United Kingdom | M2.8 | 82 km | 6 km |
| May 31, 1998 | 38 km WNW of Northam, United Kingdom | M2.8 | 91 km | 15 km |
| Jun 16, 1991 | 17 km SSW of Wembury, United Kingdom | M2.8 | 55 km | 10 km |
| Apr 2, 2000 | 33 km S of Mullion, United Kingdom | M2.7 | 76 km | 10 km |
| Jun 23, 2011 | 4 km WSW of Bovey Tracey, United Kingdom | M2.7 | 84 km | 3 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 | — | 134 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 43°F (6°C) | 4.7 in | |
| February | 43°F (6°C) | 3.5 in | Coldest |
| March | 45°F (7°C) | 3.2 in | |
| April | 47°F (8°C) | 2.5 in | |
| May | 52°F (11°C) | 2.4 in | |
| June | 57°F (14°C) | 2.6 in | |
| July | 60°F (16°C) | 2.3 in | Driest |
| August | 61°F (16°C) | 3.0 in | Warmest |
| September | 57°F (14°C) | 3.4 in | |
| October | 53°F (11°C) | 4.3 in | |
| November | 48°F (9°C) | 4.8 in | Wettest |
| December | 45°F (7°C) | 4.8 in |
Saint Dennis has a seasonal temperature swing of 18°F / from 43°F in February to 61°F in August. Total annual precipitation is 41.4 inches, with November being the wettest month (4.8") and July the driest (2.3").