All Countries
Weather & Climate in Boissy-sous-Saint-Yon, France
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Boissy-sous-Saint-Yon experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 42°F in January while summers reach 67°F in July. The area gets 231 sunny days per year, above the national average. Annual precipitation totals 32.8 inches. The area receives 2.1 inches of snow annually. The city sits at an elevation of 299 feet.
Temperature
42°F Jan (5°C)
67°F Jul (20°C)
| Annual Average | 54.6°F |
| 1% above US avg | |
| January Average | 42°F (5°C) |
| July Average | 67°F (20°C) |
| Sunny Days | 231 days/yr |
Geography
| Elevation | 299 ft (91 m) |
| Area | 1.5 sq mi (4.0 km²) |
| Population Density | 2,459/sq mi |
| Coordinates | 48.5538°N, 2.2121°W |
| Timezone | Europe/Paris |
Precipitation & Snow
Air Quality
Earthquake History
17 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| Jan 25, 1993 | 7 km SSE of Souesmes, France | M3.8 | 129 km | 18 km |
| Mar 6, 1999 | 2 km W of Vienne-en-Val, France | M3.3 | 84 km | 4 km |
| Oct 25, 1998 | 6 km NNE of Montdidier, France | M3.2 | 131 km | 7 km |
| Feb 22, 1999 | France | M3.1 | 108 km | 4 km |
| Jun 1, 2005 | 3 km N of Grandvilliers, France | M3.1 | 129 km | 10 km |
| Jun 7, 2008 | 3 km ENE of Cangey, France | M3.0 | 146 km | 3 km |
| Jan 20, 1992 | 9 km NNW of Château-Renault, France | M3.0 | 141 km | 10 km |
| Jan 5, 1994 | 0 km SSE of Saint-Martin-de-Boscherville, France | M2.7 | 134 km | 10 km |
| Dec 24, 1997 | 8 km WSW of Savigny-en-Sancerre, France | M2.7 | 134 km | 5 km |
| Aug 14, 1998 | 14 km NNW of Clamecy, France | M2.7 | 142 km | 2 km |
| May 21, 2003 | France | M2.7 | 136 km | 3 km |
| May 13, 2005 | 7 km WSW of Vermenton, France | M2.7 | 147 km | 4 km |
| Nov 3, 2000 | 5 km ESE of Ouzouer-le-Marché, France | M2.6 | 87 km | 5 km |
| Jan 26, 2000 | 3 km N of Neuvy-sur-Barangeon, France | M2.6 | 134 km | 12 km |
| Jan 12, 1999 | 5 km ESE of Ouzouer-le-Marché, France | M2.5 | 86 km | 18 km |
| Jun 11, 1997 | 4 km NE of Voves, France | M2.5 | 49 km | 10 km |
| Dec 13, 1992 | 1 km SW of La Mailleraye-sur-Seine, France | M2.5 | 147 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (5°C) | 2.0 in | |
| February | 39°F (4°C) | 1.9 in | Coldest |
| March | 45°F (7°C) | 1.9 in | |
| April | 49°F (10°C) | 2.0 in | |
| May | 56°F (14°C) | 2.4 in | Wettest |
| June | 61°F (16°C) | 2.0 in | |
| July | 67°F (20°C) | 2.2 in | Warmest |
| August | 66°F (19°C) | 1.7 in | Driest |
| September | 60°F (16°C) | 2.1 in | |
| October | 53°F (11°C) | 2.2 in | |
| November | 44°F (7°C) | 2.1 in | |
| December | 40°F (5°C) | 2.2 in |
Boissy-sous-Saint-Yon has a seasonal temperature swing of 28°F / from 39°F in February to 67°F in July. Total annual precipitation is 24.6 inches, with May being the wettest month (2.4") and August the driest (1.7").