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Weather & Climate in Silly-le-Long, France
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Silly-le-Long experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 41°F in January while summers reach 67°F in July. The area gets 226 sunny days per year, above the national average. Annual precipitation totals 39.3 inches. The area receives 2.5 inches of snow annually. The city sits at an elevation of 410 feet.
Temperature
41°F Jan (5°C)
67°F Jul (19°C)
| Annual Average | 54.2°F |
| 0% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 67°F (19°C) |
| Sunny Days | 226 days/yr |
Geography
| Elevation | 410 ft (125 m) |
| Area | 2.1 sq mi (5.4 km²) |
| Population Density | 558/sq mi |
| Coordinates | 49.1075°N, 2.7923°W |
| Timezone | Europe/Paris |
Precipitation & Snow
Air Quality
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.2.
| Oct 25, 1998 | 6 km NNE of Montdidier, France | M3.2 | 67 km | 7 km |
| Jun 1, 2005 | 3 km N of Grandvilliers, France | M3.1 | 90 km | 10 km |
| Jan 5, 1994 | 0 km SSE of Saint-Martin-de-Boscherville, France | M2.7 | 137 km | 10 km |
| Jun 11, 1997 | 4 km NE of Voves, France | M2.5 | 122 km | 10 km |
| Jun 22, 1999 | 5 km NNE of Oisemont, France | M2.5 | 122 km | 2 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 2.1 in | |
| February | 39°F (4°C) | 1.8 in | Coldest, Driest |
| March | 44°F (7°C) | 1.9 in | |
| April | 48°F (9°C) | 1.9 in | |
| May | 55°F (13°C) | 2.4 in | Wettest |
| June | 60°F (16°C) | 2.3 in | |
| July | 67°F (19°C) | 2.2 in | Warmest |
| August | 65°F (18°C) | 1.9 in | |
| September | 59°F (15°C) | 2.2 in | |
| October | 52°F (11°C) | 2.3 in | |
| November | 44°F (6°C) | 2.1 in | |
| December | 40°F (4°C) | 2.3 in |
Silly-le-Long has a seasonal temperature swing of 28°F / from 39°F in February to 67°F in July. Total annual precipitation is 25.3 inches, with May being the wettest month (2.4") and February the driest (1.8").