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Weather & Climate in Ayer, Switzerland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ayer has a cool climate with an average annual temperature of 40°F (4°C). Winters average 26°F in January while summers reach 55°F in July. The area gets 265 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 39.3 inches. The area receives 20.2 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 4,780 feet.
Temperature
26°F Jan (-3°C)
55°F Jul (13°C)
| Annual Average | 39.7°F |
| 26% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 55°F (13°C) |
| Sunny Days | 265 days/yr |
Geography
| Elevation | 4,780 ft (1,457 m) |
| Area | 4,597.3 sq mi (11,907.1 km²) |
| Population Density | 0/sq mi |
| Coordinates | 46.1809°N, 7.6012°W |
| Timezone | Europe/Zurich |
Precipitation & Snow
Air Quality
Earthquake History
927 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 | 83 km | 10 km |
| Aug 28, 1994 | 6 km SSW of Muotathal, Switzerland | M4.5 | 120 km | 8 km |
| Dec 14, 1994 | 7 km SSE of Amancy, France | M4.5 | 98 km | 10 km |
| Mar 12, 2022 | 3 km S of Faverges, France | M4.5 | 114 km | 3 km |
| Jul 15, 1996 | 3 km NE of Chilly, France | M4.5 | 127 km | 5 km |
| May 24, 1995 | 7 km NE of Le Chenit, Switzerland | M4.4 | 111 km | 6 km |
| Jul 25, 2011 | 5 km NW of Cantalupa, Italy | M4.4 | 136 km | 25 km |
| Nov 21, 1995 | 1 km SW of Collegno, Italy | M4.4 | 124 km | 22 km |
| Mar 22, 2023 | 1 km NW of Pont-de-Roide, France | M4.4 | 150 km | 12 km |
| Jul 23, 1996 | 4 km W of Choisy, France | M4.4 | 125 km | 10 km |
| Jun 14, 1993 | 3 km S of Vogogna, Italy | M4.4 | 58 km | 10 km |
| Mar 31, 1996 | 7 km NNW of Bionaz, Italy | M4.3 | 32 km | 5 km |
| Jun 30, 2010 | 3 km NW of Saint-Martin-de-Belleville, France | M4.3 | 122 km | 2 km |
| Nov 16, 1995 | 1 km ENE of Einsiedeln, Switzerland | M4.3 | 138 km | 5 km |
| Apr 29, 2003 | 2 km SSW of Varen, Switzerland | M4.3 | 13 km | 8 km |
| Feb 11, 1990 | northern Italy | M4.3 | 130 km | 10 km |
| May 6, 2003 | 7 km WSW of Linthal, Switzerland | M4.3 | 128 km | 6 km |
| May 14, 2004 | 0 km SSE of Chiusa di San Michele, Italy | M4.2 | 122 km | 10 km |
| Aug 22, 2003 | 6 km NNW of Savièse, Switzerland | M4.2 | 27 km | 4 km |
| Jul 30, 2016 | 0 km SSW of Fleccia-Chianavasso, Italy | M4.2 | 141 km | 11 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 | 97 km |
| 1996 | LAKE BRIENZ | Meteorological | 0.5 m | — | 67 km |
| 563 | LAKE GENEVA | Meteorological | — | — | 63 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 3.4 in | Coldest |
| February | 27°F (-3°C) | 3.5 in | |
| March | 31°F (-1°C) | 3.1 in | |
| April | 35°F (2°C) | 3.0 in | |
| May | 44°F (7°C) | 3.4 in | |
| June | 50°F (10°C) | 3.4 in | |
| July | 55°F (13°C) | 3.0 in | |
| August | 56°F (13°C) | 3.2 in | Warmest |
| September | 50°F (10°C) | 2.7 in | Driest |
| October | 42°F (6°C) | 3.5 in | |
| November | 33°F (0°C) | 3.7 in | Wettest |
| December | 28°F (-2°C) | 3.6 in |
Ayer has a seasonal temperature swing of 29°F / from 26°F in January to 56°F in August. Total annual precipitation is 39.3 inches, with November being the wettest month (3.7") and September the driest (2.7").