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Weather & Climate in Saint Andrew, Guernsey
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Saint Andrew experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 49°F in January while summers reach 62°F in July / relatively mild seasonal variation. The area gets 241 sunny days per year, above the national average. Annual precipitation totals 42.9 inches. The city sits at an elevation of 266 feet.
Temperature
49°F Jan (9°C)
62°F Jul (16°C)
| Annual Average | 52.2°F |
| 3% below US avg | |
| January Average | 49°F (9°C) |
| July Average | 62°F (16°C) |
| Sunny Days | 241 days/yr |
Geography
| Elevation | 266 ft (81 m) |
| Area | 2.5 sq mi (6.5 km²) |
| Population Density | 0/sq mi |
| Coordinates | 49.4439°N, 2.5802°W |
| Timezone | Europe/Guernsey |
Precipitation & Snow
Air Quality
Earthquake History
79 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.
| Apr 30, 1990 | 5 km SE of Saint Helier, Jersey | M4.2 | 50 km | 22 km |
| Jul 11, 2014 | 23 km W of Saint Helier, Jersey | M3.9 | 35 km | 12 km |
| Jul 11, 2002 | 3 km NW of Pluduno, France | M3.8 | 101 km | 10 km |
| Feb 25, 2015 | 30 km SW of Saint Helier, Jersey | M3.7 | 51 km | 2 km |
| Aug 17, 1995 | 28 km S of Salcombe, United Kingdom | M3.6 | 106 km | 10 km |
| Jul 26, 1993 | 5 km ESE of Villedieu-les-Poêles, France | M3.5 | 125 km | 31 km |
| Apr 22, 1995 | 6 km E of Binic, France | M3.5 | 94 km | 10 km |
| Dec 7, 1998 | 0 km SE of Cherrueix, France | M3.4 | 114 km | 2 km |
| Sep 17, 1994 | 33 km NE of Plouézec, France | M3.4 | 58 km | 10 km |
| Jun 22, 1997 | 13 km SSE of Saint Helier, Jersey | M3.4 | 58 km | 10 km |
| Aug 29, 2001 | 5 km ENE of Saint-Lô, France | M3.3 | 118 km | 6 km |
| Jul 23, 2014 | France | M3.3 | 54 km | 2 km |
| Sep 22, 1991 | 5 km ENE of Neulliac, France | M3.3 | 147 km | 10 km |
| Feb 12, 1990 | 1 km N of Lanmeur, France | M3.2 | 120 km | 10 km |
| Jul 14, 1998 | 7 km NNE of Poullaouen, France | M3.2 | 138 km | 2 km |
| Oct 16, 1997 | 4 km ENE of Torquay, United Kingdom | M3.2 | 132 km | 10 km |
| May 30, 2001 | 3 km SW of Quintin, France | M3.2 | 121 km | 8 km |
| Apr 28, 1998 | 3 km NE of Plouha, France | M3.1 | 86 km | 2 km |
| Apr 17, 1992 | 3 km SSE of Plounévez-Quintin, France | M3.1 | 139 km | 10 km |
| Jul 13, 2006 | 12 km N of Plounéour-Trez, France | M3.1 | 148 km | 13 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 | — | 121 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 49°F (9°C) | 4.1 in | |
| February | 43°F (6°C) | 3.2 in | Coldest |
| March | 46°F (8°C) | 2.9 in | |
| April | 48°F (9°C) | 2.1 in | |
| May | 53°F (12°C) | 2.0 in | |
| June | 58°F (14°C) | 1.9 in | |
| July | 62°F (16°C) | 1.6 in | Driest |
| August | 62°F (17°C) | 1.9 in | Warmest |
| September | 60°F (15°C) | 2.7 in | |
| October | 55°F (13°C) | 3.6 in | |
| November | 50°F (10°C) | 4.3 in | Wettest |
| December | 46°F (8°C) | 4.1 in |
Saint Andrew has a seasonal temperature swing of 19°F / from 43°F in February to 62°F in August. Total annual precipitation is 34.4 inches, with November being the wettest month (4.3") and July the driest (1.6").