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Weather & Climate in Promontogno, Switzerland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Promontogno has a cool climate with an average annual temperature of 44°F (6°C). Winters average 14°F in January while summers reach 60°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 48.9 inches (wetter than the 38-inch national average). The area receives 202.3 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 2,740 feet.
Temperature
14°F Jan (-10°C)
60°F Jul (15°C)
| Annual Average | 43.5°F |
| 19% below US avg | |
| January Average | 14°F (-10°C) |
| July Average | 60°F (15°C) |
| Sunny Days | 269 days/yr |
Geography
| Elevation | 2,740 ft (835 m) |
| Area | 36.6 sq mi (94.8 km²) |
| Population Density | 0/sq mi |
| Coordinates | 46.3394°N, 9.5576°W |
| Timezone | Europe/Zurich |
Precipitation & Snow
Air Quality
Earthquake History
645 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.9.
| Oct 29, 1995 | 0 km WNW of Adro, Italy | M4.9 | 86 km | 10 km |
| Dec 29, 1999 | 12 km N of Isolaccia, Italy | M4.8 | 64 km | 10 km |
| Jul 17, 2001 | 3 km NNE of Rifiano, Italy | M4.7 | 133 km | 10 km |
| Mar 31, 1994 | 2 km W of Warth, Austria | M4.7 | 111 km | 14 km |
| Nov 20, 1991 | 1 km WSW of Churwalden, Switzerland | M4.7 | 49 km | 10 km |
| Jun 5, 1997 | 2 km ESE of Namlos, Austria | M4.6 | 141 km | 5 km |
| Aug 28, 1994 | 6 km SSW of Muotathal, Switzerland | M4.5 | 90 km | 8 km |
| Apr 6, 2000 | 11 km WSW of Tubre, Italy | M4.5 | 66 km | 5 km |
| Feb 17, 1992 | 4 km NNE of Scharans, Switzerland | M4.5 | 47 km | 10 km |
| Oct 1, 2001 | 11 km WSW of Tubre, Italy | M4.5 | 66 km | 10 km |
| Jan 4, 2009 | 3 km S of Wildhaus, Switzerland | M4.5 | 94 km | 3 km |
| May 15, 1992 | 1 km W of Sennwald, Switzerland | M4.4 | 103 km | 5 km |
| Nov 22, 1997 | 4 km SSW of Krummenau, Switzerland | M4.4 | 101 km | 10 km |
| May 8, 1992 | 0 km NNW of Sennwald, Switzerland | M4.4 | 103 km | 5 km |
| May 8, 1992 | 2 km WSW of Sennwald, Switzerland | M4.4 | 102 km | 5 km |
| Jun 14, 1993 | 3 km S of Vogogna, Italy | M4.4 | 105 km | 10 km |
| Dec 31, 1999 | 11 km WSW of Tubre, Italy | M4.3 | 66 km | 10 km |
| Nov 16, 1995 | 1 km ENE of Einsiedeln, Switzerland | M4.3 | 107 km | 5 km |
| Feb 22, 2021 | 2 km SSE of Brentonico, Italy | M4.3 | 124 km | 11 km |
| May 6, 2003 | 7 km WSW of Linthal, Switzerland | M4.3 | 80 km | 6 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
4 tsunamis recorded within 500 km. Highest wave on record: 95.0 m (312 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1987 | VALTELLINA | Meteorological | 95.0 m | 27 | 60 km |
| 1601 | LAKE LUCERNE | Eruption + Earthquake | 4.0 m | 8 | 96 km |
| 1996 | LAKE BRIENZ | Meteorological | 0.5 m | — | 129 km |
| 1868 | LAKE GARDA | Earthquake | — | — | 113 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 14°F (-10°C) | 2.7 in | Coldest |
| February | 31°F (-1°C) | 2.1 in | Driest |
| March | 36°F (2°C) | 2.9 in | |
| April | 40°F (5°C) | 3.8 in | |
| May | 49°F (9°C) | 4.9 in | |
| June | 55°F (13°C) | 5.2 in | Wettest |
| July | 60°F (15°C) | 4.8 in | Warmest |
| August | 59°F (15°C) | 5.1 in | |
| September | 53°F (12°C) | 5.1 in | |
| October | 45°F (7°C) | 4.7 in | |
| November | 36°F (2°C) | 3.5 in | |
| December | 31°F (-1°C) | 2.6 in |
Promontogno has a seasonal temperature swing of 45°F / from 14°F in January to 60°F in July. Total annual precipitation is 47.4 inches, with June being the wettest month (5.2") and February the driest (2.1").