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Weather & Climate in Sailly-lez-Lannoy, France
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Sailly-lez-Lannoy experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 42°F in January while summers reach 65°F in July. The area gets 218 sunny days per year. Annual precipitation totals 38.2 inches. The area receives 4.7 inches of snow annually. The city sits at an elevation of 141 feet.
Temperature
42°F Jan (6°C)
65°F Jul (19°C)
| Annual Average | 53.8°F |
| 0% below US avg | |
| January Average | 42°F (6°C) |
| July Average | 65°F (19°C) |
| Sunny Days | 218 days/yr |
Geography
| Elevation | 141 ft (43 m) |
| Area | 1.7 sq mi (4.4 km²) |
| Population Density | 1,055/sq mi |
| Coordinates | 50.6500°N, 3.2167°W |
| Timezone | Europe/Paris |
Precipitation & Snow
Air Quality
Earthquake History
43 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.3.
| Jun 20, 1995 | 1 km N of Ghlin, Belgium | M4.3 | 52 km | 20 km |
| Aug 29, 1992 | 4 km SSE of Cousolre, France | M4.1 | 84 km | 18 km |
| Jan 23, 2007 | 57 km ENE of Broadstairs, United Kingdom | M4.1 | 134 km | 10 km |
| Dec 14, 1991 | 3 km SSE of Longfossé, France | M4.0 | 98 km | 10 km |
| Sep 15, 1994 | 38 km NE of Broadstairs, United Kingdom | M3.9 | 148 km | 10 km |
| Aug 26, 1992 | 2 km WSW of Rance, Belgium | M3.9 | 93 km | 10 km |
| Jan 27, 1998 | 27 km W of Le Touquet-Paris-Plage, France | M3.8 | 143 km | 2 km |
| Jul 13, 2008 | 0 km ESE of Court-Saint-Étienne, Belgium | M3.8 | 96 km | 4 km |
| May 22, 2015 | 3 km SSE of Ramsgate, United Kingdom | M3.7 | 144 km | 12 km |
| Jul 20, 1994 | 2 km N of Rousies, France | M3.5 | 68 km | 5 km |
| Jan 27, 1992 | 6 km SSE of Longfossé, France | M3.5 | 97 km | 10 km |
| Feb 13, 1997 | 26 km W of Le Touquet-Paris-Plage, France | M3.2 | 142 km | 5 km |
| Oct 25, 1998 | 6 km NNE of Montdidier, France | M3.2 | 114 km | 7 km |
| Jul 14, 2008 | 1 km SW of Boussu, Belgium | M3.2 | 47 km | 4 km |
| Jun 1, 2005 | 3 km N of Grandvilliers, France | M3.1 | 139 km | 10 km |
| Feb 27, 2005 | 1 km NW of Libercourt, France | M3.1 | 23 km | 4 km |
| Jul 20, 1994 | 1 km NE of Quévy-le-Petit, Belgium | M3.1 | 60 km | 5 km |
| May 4, 1990 | 0 km NE of Coquelles, France | M3.1 | 104 km | 10 km |
| May 10, 1990 | 1 km W of Modave, Belgium | M3.1 | 147 km | 11 km |
| Jul 2, 2001 | 3 km NNE of Oostduinkerke, Belgium | M3.1 | 66 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
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 | — | 121 km |
| 1911 | FOLKSTONE, ENGLAND | Meteorological | 0.9 m | — | 147 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 2.3 in | |
| February | 39°F (4°C) | 1.7 in | Coldest, Driest |
| March | 44°F (6°C) | 2.4 in | |
| April | 48°F (9°C) | 1.9 in | |
| May | 55°F (13°C) | 2.5 in | |
| June | 60°F (15°C) | 2.7 in | |
| July | 65°F (19°C) | 2.5 in | Warmest |
| August | 64°F (18°C) | 2.1 in | |
| September | 59°F (15°C) | 2.5 in | |
| October | 52°F (11°C) | 2.7 in | |
| November | 44°F (7°C) | 2.9 in | Wettest |
| December | 40°F (4°C) | 2.6 in |
Sailly-lez-Lannoy has a seasonal temperature swing of 27°F / from 39°F in February to 65°F in July. Total annual precipitation is 28.8 inches, with November being the wettest month (2.9") and February the driest (1.7").