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Weather & Climate in Ecublens, Switzerland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ecublens has a cool climate with an average annual temperature of 40°F (4°C). Winters average 22°F in January while summers reach 55°F in July. The area gets 269 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 80.8 inches (wetter than the 38-inch national average). The area receives 176.4 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 1,939 feet.
Temperature
22°F Jan (-5°C)
55°F Jul (13°C)
| Annual Average | 39.5°F |
| 27% below US avg | |
| January Average | 22°F (-5°C) |
| July Average | 55°F (13°C) |
| Sunny Days | 269 days/yr |
Geography
| Elevation | 1,939 ft (591 m) |
| Area | 8.6 sq mi (22.2 km²) |
| Population Density | 1,173/sq mi |
| Coordinates | 46.6074°N, 6.8090°W |
| Timezone | Europe/Zurich |
Precipitation & Snow
Air Quality
Earthquake History
785 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 | 37 km | 10 km |
| Dec 14, 1994 | 7 km SSE of Amancy, France | M4.5 | 75 km | 10 km |
| Mar 12, 2022 | 3 km S of Faverges, France | M4.5 | 107 km | 3 km |
| Jul 15, 1996 | 3 km NE of Chilly, France | M4.5 | 92 km | 5 km |
| Jun 14, 1993 | 3 km S of Vogogna, Italy | M4.4 | 134 km | 10 km |
| Feb 23, 2004 | 5 km SSE of Roulans, France | M4.4 | 84 km | 17 km |
| Mar 22, 2023 | 1 km NW of Pont-de-Roide, France | M4.4 | 88 km | 12 km |
| May 24, 1995 | 7 km NE of Le Chenit, Switzerland | M4.4 | 38 km | 6 km |
| Jul 23, 1996 | 4 km W of Choisy, France | M4.4 | 92 km | 10 km |
| Jun 30, 2010 | 3 km NW of Saint-Martin-de-Belleville, France | M4.3 | 136 km | 2 km |
| Apr 29, 2003 | 2 km SSW of Varen, Switzerland | M4.3 | 70 km | 8 km |
| Mar 31, 1996 | 7 km NNW of Bionaz, Italy | M4.3 | 87 km | 5 km |
| May 14, 1999 | 9 km NW of Brienz, Switzerland | M4.2 | 89 km | 5 km |
| Aug 22, 2003 | 6 km NNW of Savièse, Switzerland | M4.2 | 51 km | 4 km |
| May 20, 1999 | 4 km SSE of Plaffeien, Switzerland | M4.2 | 39 km | 2 km |
| Jun 28, 2004 | 2 km NNW of Brugg, Switzerland | M4.2 | 145 km | 20 km |
| Feb 11, 2012 | 2 km WNW of Unterägeri, Switzerland | M4.2 | 145 km | 32 km |
| May 12, 2005 | 1 km NW of Oensingen, Switzerland | M4.2 | 103 km | 25 km |
| Oct 7, 1995 | 1 km SSE of Grolley, Switzerland | M4.1 | 32 km | 10 km |
| Jan 11, 2006 | 1 km S of Saint-Rambert-en-Bugey, France | M4.1 | 129 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
3 tsunamis recorded within 500 km. Highest wave on record: 4.0 m (13 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1601 | LAKE LUCERNE | Eruption + Earthquake | 4.0 m | 8 | 131 km |
| 1996 | LAKE BRIENZ | Meteorological | 0.5 m | — | 90 km |
| 563 | LAKE GENEVA | Meteorological | — | — | 28 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-5°C) | 3.6 in | Coldest |
| February | 34°F (1°C) | 3.6 in | |
| March | 40°F (4°C) | 3.3 in | Driest |
| April | 45°F (7°C) | 3.5 in | |
| May | 53°F (12°C) | 4.2 in | |
| June | 59°F (15°C) | 5.1 in | Wettest |
| July | 55°F (13°C) | 4.4 in | |
| August | 63°F (17°C) | 4.5 in | Warmest |
| September | 57°F (14°C) | 4.2 in | |
| October | 48°F (9°C) | 4.1 in | |
| November | 39°F (4°C) | 4.3 in | |
| December | 34°F (1°C) | 4.1 in |
Ecublens has a seasonal temperature swing of 41°F / from 22°F in January to 63°F in August. Total annual precipitation is 48.8 inches, with June being the wettest month (5.1") and March the driest (3.3").