Grande-Synthe, France

Full City Profile

1.9 /5.0

D Poor

23,213 Population 2,804/sq mi density

7 ft Elevation 2 meters

54°F Avg Temperature 12°C

Overall

1.9 / 5.0

Below average overall score based on economy, affordability, safety and education

Economy

1.0 / 5.0

$17,982 median income, 26.8% unemployment

C+

Affordability

2.7 / 5.0

$125,000 home value, $625/mo rent

Grande-Synthe experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 43°F in January while summers reach 65°F in July. The area gets 225 sunny days per year. Annual precipitation totals 39.9 inches. The area receives 5.7 inches of snow annually.

Temperature

43°F Jan (6°C) 65°F Jul (18°C)

Annual Average	53.6°F
	1% below US avg
January Average	43°F (6°C)
July Average	65°F (18°C)
Sunny Days	225 days/yr

Geography

Elevation	7 ft (2 m)
Area	8.3 sq mi (21.4 km²)
Population Density	2,804/sq mi
Coordinates	51.0154°N, 2.2998°W
Timezone	Europe/Paris

Precipitation & Snow

Annual Rainfall 39.9"

5% above US avg

Snowfall 5.7"

Wettest Month (Nov) 2.87"

Driest Month (Feb) 1.57"

Air Quality

Earthquake History

36 earthquakes (M2.5+) within 150 km since 1990. Strongest: M4.6. Most recent: M3.7 on May 22, 2015.

Apr 28, 2007	1 km WNW of Lympne, United Kingdom	M4.6	91 km
Jun 20, 1995	1 km N of Ghlin, Belgium	M4.3	127 km
Jan 23, 2007	57 km ENE of Broadstairs, United Kingdom	M4.1	71 km
Dec 14, 1991	3 km SSE of Longfossé, France	M4.0	55 km
Sep 15, 1994	38 km NE of Broadstairs, United Kingdom	M3.9	77 km
Jan 27, 1998	27 km W of Le Touquet-Paris-Plage, France	M3.8	96 km
May 22, 2015	3 km SSE of Ramsgate, United Kingdom	M3.7	68 km
Jul 20, 1994	2 km N of Rousies, France	M3.5	144 km
Mar 3, 2009	1 km ENE of Hawkinge, United Kingdom	M3.5	79 km
Jan 27, 1992	6 km SSE of Longfossé, France	M3.5	56 km
Feb 13, 1997	26 km W of Le Touquet-Paris-Plage, France	M3.2	94 km
Jul 14, 2008	1 km SW of Boussu, Belgium	M3.2	123 km
Oct 25, 1998	6 km NNE of Montdidier, France	M3.2	148 km
Feb 27, 2005	1 km NW of Libercourt, France	M3.1	76 km
Jun 1, 2005	3 km N of Grandvilliers, France	M3.1	148 km
May 4, 1990	0 km NE of Coquelles, France	M3.1	36 km
Jul 20, 1994	1 km NE of Quévy-le-Petit, Belgium	M3.1	136 km
Jul 2, 2001	3 km NNE of Oostduinkerke, Belgium	M3.1	31 km
May 1, 1997	21 km W of Fort-Mahon-Plage, France	M3.0	106 km
Mar 28, 1996	67 km ESE of Aldeburgh, United Kingdom	M3.0	98 km

Source: USGS (M2.5+, 1990–2025)

Tsunami History

2 tsunamis recorded within 500 km. Highest wave on record: 6.0 m (20 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1858	NORTH SEA	Unknown	6.0 m	—	48 km
1911	FOLKSTONE, ENGLAND	Meteorological	0.9 m	—	75 km

Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	43°F (6°C)	2.2 in
February	41°F (5°C)	1.6 in	Coldest, Driest
March	45°F (7°C)	1.9 in
April	48°F (9°C)	1.8 in
May	54°F (12°C)	1.8 in
June	59°F (15°C)	2.1 in
July	65°F (18°C)	2.0 in	Warmest
August	64°F (18°C)	1.9 in
September	60°F (16°C)	2.6 in
October	54°F (12°C)	2.7 in
November	47°F (8°C)	2.9 in	Wettest
December	43°F (6°C)	2.4 in

Grande-Synthe has a seasonal temperature swing of 24°F / from 41°F in February to 65°F in July. Total annual precipitation is 25.8 inches, with November being the wettest month (2.9") and February the driest (1.6").

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