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Weather & Climate in Altnau, Switzerland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Altnau experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 38°F in January while summers reach 70°F in July. The area gets 244 sunny days per year, above the national average. Annual precipitation totals 71.8 inches (wetter than the 38-inch national average). The area receives 37.0 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 1,444 feet.
Temperature
38°F Jan (3°C)
70°F Jul (21°C)
| Annual Average | 53.8°F |
| 0% below US avg | |
| January Average | 38°F (3°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 244 days/yr |
Geography
| Elevation | 1,444 ft (440 m) |
| Area | 8.9 sq mi (23.1 km²) |
| Population Density | 212/sq mi |
| Coordinates | 47.6105°N, 9.2616°W |
| Timezone | Europe/Zurich |
Precipitation & Snow
Air Quality
Earthquake History
652 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.
| Dec 29, 1999 | 12 km N of Isolaccia, Italy | M4.8 | 137 km | 10 km |
| Mar 22, 2003 | 2 km WSW of Albstadt, Germany | M4.7 | 70 km | 6 km |
| Nov 20, 1991 | 1 km WSW of Churwalden, Switzerland | M4.7 | 95 km | 10 km |
| Mar 31, 1994 | 2 km W of Warth, Austria | M4.7 | 78 km | 14 km |
| Jun 5, 1997 | 2 km ESE of Namlos, Austria | M4.6 | 112 km | 5 km |
| Oct 1, 2001 | 11 km WSW of Tubre, Italy | M4.5 | 137 km | 10 km |
| Aug 28, 1994 | 6 km SSW of Muotathal, Switzerland | M4.5 | 86 km | 8 km |
| Feb 17, 1992 | 4 km NNE of Scharans, Switzerland | M4.5 | 97 km | 10 km |
| Jan 4, 2009 | 3 km S of Wildhaus, Switzerland | M4.5 | 49 km | 3 km |
| Apr 6, 2000 | 11 km WSW of Tubre, Italy | M4.5 | 138 km | 5 km |
| May 8, 1992 | 2 km WSW of Sennwald, Switzerland | M4.4 | 43 km | 5 km |
| Nov 22, 1997 | 4 km SSW of Krummenau, Switzerland | M4.4 | 46 km | 10 km |
| May 15, 1992 | 1 km W of Sennwald, Switzerland | M4.4 | 42 km | 5 km |
| May 8, 1992 | 0 km NNW of Sennwald, Switzerland | M4.4 | 42 km | 5 km |
| Nov 16, 1995 | 1 km ENE of Einsiedeln, Switzerland | M4.3 | 65 km | 5 km |
| May 6, 2003 | 7 km WSW of Linthal, Switzerland | M4.3 | 84 km | 6 km |
| Dec 31, 1999 | 11 km WSW of Tubre, Italy | M4.3 | 138 km | 10 km |
| Jun 28, 2004 | 2 km NNW of Brugg, Switzerland | M4.2 | 81 km | 20 km |
| Feb 11, 2012 | 2 km WNW of Unterägeri, Switzerland | M4.2 | 74 km | 32 km |
| Aug 24, 1996 | 1 km E of Sirnach, Switzerland | M4.2 | 25 km | 20 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 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 | 107 km |
| 1996 | LAKE BRIENZ | Meteorological | 0.5 m | — | 138 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 38°F (3°C) | 2.0 in | Driest |
| February | 35°F (2°C) | 2.3 in | Coldest |
| March | 42°F (5°C) | 2.2 in | |
| April | 47°F (9°C) | 3.0 in | |
| May | 56°F (13°C) | 3.7 in | |
| June | 62°F (16°C) | 4.7 in | Wettest |
| July | 70°F (21°C) | 4.6 in | Warmest |
| August | 65°F (18°C) | 4.1 in | |
| September | 58°F (15°C) | 3.2 in | |
| October | 49°F (10°C) | 2.8 in | |
| November | 40°F (4°C) | 3.1 in | |
| December | 35°F (2°C) | 2.6 in |
Altnau has a seasonal temperature swing of 35°F / from 35°F in February to 70°F in July. Total annual precipitation is 38.2 inches, with June being the wettest month (4.7") and January the driest (2.0").