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Saint Helier, Jersey

Full City Profile

28,000 Population 6,846/sq mi density
36 ft Elevation 11 meters
53°F Avg Temperature 12°C
Saint Helier experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 44°F in January while summers reach 63°F in July. The area gets 276 sunny days per year. Annual precipitation totals 33.4 inches. The area receives 0.0 inches of snow annually.

Temperature

44°F Jan (7°C) 63°F Jul (17°C)
Annual Average52.7°F
2% below US avg
January Average44°F (7°C)
July Average63°F (17°C)
Sunny Days276 days/yr

Geography

Elevation36 ft (11 m)
Area4.1 sq mi (10.6 km²)
Population Density6,846/sq mi
Coordinates49.1880°N, 2.1049°W
TimezoneEurope/Jersey

Precipitation & Snow

Annual Rainfall 33.4"
12% below US avg
Snowfall 0.0"
Wettest Month (Nov) 4.21"
Driest Month (Jul) 1.50"

Air Quality

Earthquake History

20 earthquakes (M2.5+) within 150 km since 1990. Strongest: M4.2. Most recent: M0.0 on Feb 25, 2015.

Apr 30, 1990 5 km SE of Saint Helier, Jersey M4.2 6 km
Nov 30, 1994 17 km N of Courseulles-sur-Mer, France M4.1 125 km
Jul 11, 2014 23 km W of Saint Helier, Jersey M3.9 23 km
Jul 14, 2011 62 km SSE of Ventnor, United Kingdom M3.9 143 km
Jul 11, 2002 3 km NW of Pluduno, France M3.8 73 km
Nov 2, 1997 7 km NW of Villers-sur-Mer, France M3.7 149 km
Feb 25, 2015 30 km SW of Saint Helier, Jersey M3.7 30 km
Sep 23, 2003 41 km WNW of Étretat, France M3.6 148 km
Apr 22, 1995 6 km E of Binic, France M3.5 80 km
Jul 26, 1993 5 km ESE of Villedieu-les-Poêles, France M3.5 81 km
Aug 8, 1998 1 km SE of Cairon, France M3.5 121 km
Dec 7, 1998 0 km SE of Cherrueix, France M3.4 72 km
Sep 17, 1994 33 km NE of Plouézec, France M3.4 48 km
Jun 22, 1997 13 km SSE of Saint Helier, Jersey M3.4 14 km
Aug 29, 2001 5 km ENE of Saint-Lô, France M3.3 79 km
Jul 23, 2014 France M3.3 28 km
Dec 5, 2000 2 km W of Guillac, France M3.3 145 km
Sep 22, 1991 5 km ENE of Neulliac, France M3.3 131 km
Jul 14, 1998 7 km NNE of Poullaouen, France M3.2 140 km
Feb 12, 1990 1 km N of Lanmeur, France M3.2 131 km
Source: USGS (M2.5+, 1990–2025)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 44°F (7°C) 3.9 in
February 44°F (6°C) 3.0 in Coldest
March 46°F (8°C) 2.8 in
April 49°F (9°C) 2.0 in
May 54°F (12°C) 2.0 in
June 59°F (15°C) 1.9 in
July 63°F (17°C) 1.5 in Driest
August 64°F (18°C) 1.8 in Warmest
September 60°F (16°C) 2.7 in
October 55°F (13°C) 3.5 in
November 49°F (10°C) 4.2 in Wettest
December 46°F (8°C) 4.1 in

Saint Helier has a seasonal temperature swing of 20°F / from 44°F in February to 64°F in August. Total annual precipitation is 33.4 inches, with November being the wettest month (4.2") and July the driest (1.5").

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