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Weather & Climate in La Roche-sur-Foron, France
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
La Roche-sur-Foron has a cool climate with an average annual temperature of 44°F (7°C). Winters average 26°F in January while summers reach 61°F in July. The area gets 278 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 88.1 inches (wetter than the 38-inch national average). The area receives 140.6 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 1,873 feet.
Temperature
26°F Jan (-4°C)
61°F Jul (16°C)
| Annual Average | 44.4°F |
| 18% below US avg | |
| January Average | 26°F (-4°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 278 days/yr |
Geography
| Elevation | 1,873 ft (571 m) |
| Area | 6.9 sq mi (17.9 km²) |
| Population Density | 1,447/sq mi |
| Coordinates | 46.0711°N, 6.3045°W |
| Timezone | Europe/Paris |
Precipitation & Snow
Air Quality
Earthquake History
975 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Feb 14, 1999 | 3 km NNE of Belfaux, Switzerland | M4.7 | 108 km | 10 km |
| Feb 11, 1991 | 5 km ESE of Briançon, France | M4.6 | 137 km | 14 km |
| Jul 15, 1996 | 3 km NE of Chilly, France | M4.5 | 26 km | 5 km |
| Mar 12, 2022 | 3 km S of Faverges, France | M4.5 | 39 km | 3 km |
| Dec 14, 1994 | 7 km SSE of Amancy, France | M4.5 | 8 km | 10 km |
| Jul 23, 1996 | 4 km W of Choisy, France | M4.4 | 24 km | 10 km |
| Feb 23, 2004 | 5 km SSE of Roulans, France | M4.4 | 134 km | 17 km |
| Jul 25, 2011 | 5 km NW of Cantalupa, Italy | M4.4 | 143 km | 25 km |
| Nov 21, 1995 | 1 km SW of Collegno, Italy | M4.4 | 148 km | 22 km |
| May 24, 1995 | 7 km NE of Le Chenit, Switzerland | M4.4 | 64 km | 6 km |
| Jun 30, 2010 | 3 km NW of Saint-Martin-de-Belleville, France | M4.3 | 75 km | 2 km |
| Mar 31, 1996 | 7 km NNW of Bionaz, Italy | M4.3 | 86 km | 5 km |
| Apr 29, 2003 | 2 km SSW of Varen, Switzerland | M4.3 | 103 km | 8 km |
| May 20, 1999 | 4 km SSE of Plaffeien, Switzerland | M4.2 | 104 km | 2 km |
| May 14, 1999 | 9 km NW of Brienz, Switzerland | M4.2 | 150 km | 5 km |
| Jan 11, 1999 | 2 km W of Saint-Paul-de-Varces, France | M4.2 | 123 km | 10 km |
| Jul 30, 2016 | 0 km SSW of Fleccia-Chianavasso, Italy | M4.2 | 144 km | 11 km |
| Aug 22, 2003 | 6 km NNW of Savièse, Switzerland | M4.2 | 81 km | 4 km |
| May 14, 2004 | 0 km SSE of Chiusa di San Michele, Italy | M4.2 | 134 km | 10 km |
| Jan 11, 2006 | 1 km S of Saint-Rambert-en-Bugey, France | M4.1 | 69 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: 0.5 m (2 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1996 | LAKE BRIENZ | Meteorological | 0.5 m | — | 147 km |
| 563 | LAKE GENEVA | Meteorological | — | — | 51 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-4°C) | 3.8 in | Coldest |
| February | 34°F (1°C) | 3.9 in | |
| March | 40°F (4°C) | 3.2 in | |
| April | 45°F (7°C) | 3.0 in | Driest |
| May | 53°F (12°C) | 3.5 in | |
| June | 59°F (15°C) | 4.1 in | |
| July | 61°F (16°C) | 3.3 in | |
| August | 63°F (17°C) | 3.2 in | Warmest |
| September | 57°F (14°C) | 4.0 in | |
| October | 49°F (9°C) | 4.1 in | |
| November | 39°F (4°C) | 4.3 in | Wettest |
| December | 34°F (1°C) | 4.3 in |
La Roche-sur-Foron has a seasonal temperature swing of 38°F / from 26°F in January to 63°F in August. Total annual precipitation is 44.7 inches, with November being the wettest month (4.3") and April the driest (3.0").