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Weather & Climate in Ronco sopra Ascona, Switzerland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ronco sopra Ascona experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 40°F in January while summers reach 71°F in July. The area gets 296 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 71.6 inches (wetter than the 38-inch national average). The area receives 9.9 inches of snow annually. The city sits at an elevation of 1,237 feet.
Temperature
40°F Jan (4°C)
71°F Jul (22°C)
| Annual Average | 54.9°F |
| 2% above US avg | |
| January Average | 40°F (4°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 296 days/yr |
Geography
| Elevation | 1,237 ft (377 m) |
| Area | 10.9 sq mi (28.1 km²) |
| Population Density | 62/sq mi |
| Coordinates | 46.1462°N, 8.7279°W |
| Timezone | Europe/Zurich |
Precipitation & Snow
Air Quality
Earthquake History
895 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 | 112 km | 10 km |
| Aug 21, 2000 | 1 km WNW of Oviglio, Italy | M4.9 | 144 km | 10 km |
| Dec 29, 1999 | 12 km N of Isolaccia, Italy | M4.8 | 131 km | 10 km |
| Jul 18, 2001 | 3 km S of Masio, Italy | M4.7 | 148 km | 0 km |
| Nov 20, 1991 | 1 km WSW of Churwalden, Switzerland | M4.7 | 93 km | 10 km |
| Feb 14, 1999 | 3 km NNE of Belfaux, Switzerland | M4.7 | 145 km | 10 km |
| Jan 4, 2009 | 3 km S of Wildhaus, Switzerland | M4.5 | 124 km | 3 km |
| Oct 1, 2001 | 11 km WSW of Tubre, Italy | M4.5 | 133 km | 10 km |
| Aug 28, 1994 | 6 km SSW of Muotathal, Switzerland | M4.5 | 86 km | 8 km |
| Apr 6, 2000 | 11 km WSW of Tubre, Italy | M4.5 | 133 km | 5 km |
| Feb 17, 1992 | 4 km NNE of Scharans, Switzerland | M4.5 | 89 km | 10 km |
| May 8, 1992 | 0 km NNW of Sennwald, Switzerland | M4.4 | 138 km | 5 km |
| May 15, 1992 | 1 km W of Sennwald, Switzerland | M4.4 | 137 km | 5 km |
| Nov 22, 1997 | 4 km SSW of Krummenau, Switzerland | M4.4 | 122 km | 10 km |
| Jun 14, 1993 | 3 km S of Vogogna, Italy | M4.4 | 38 km | 10 km |
| May 8, 1992 | 2 km WSW of Sennwald, Switzerland | M4.4 | 136 km | 5 km |
| May 6, 2003 | 7 km WSW of Linthal, Switzerland | M4.3 | 85 km | 6 km |
| Mar 31, 1996 | 7 km NNW of Bionaz, Italy | M4.3 | 105 km | 5 km |
| Apr 29, 2003 | 2 km SSW of Varen, Switzerland | M4.3 | 88 km | 8 km |
| Dec 31, 1999 | 11 km WSW of Tubre, Italy | M4.3 | 133 km | 10 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 | 127 km |
| 1601 | LAKE LUCERNE | Eruption + Earthquake | 4.0 m | 8 | 75 km |
| 1996 | LAKE BRIENZ | Meteorological | 0.5 m | — | 87 km |
| 563 | LAKE GENEVA | Meteorological | — | — | 149 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (4°C) | 2.9 in | |
| February | 37°F (3°C) | 2.5 in | Driest |
| March | 43°F (6°C) | 3.6 in | |
| April | 48°F (9°C) | 4.8 in | |
| May | 56°F (13°C) | 6.1 in | Wettest |
| June | 62°F (17°C) | 5.9 in | |
| July | 71°F (22°C) | 4.7 in | Warmest |
| August | 66°F (19°C) | 5.6 in | |
| September | 60°F (15°C) | 5.4 in | |
| October | 51°F (10°C) | 5.3 in | |
| November | 42°F (5°C) | 3.9 in | |
| December | 36°F (2°C) | 2.7 in | Coldest |
Ronco sopra Ascona has a seasonal temperature swing of 35°F / from 36°F in December to 71°F in July. Total annual precipitation is 53.3 inches, with May being the wettest month (6.1") and February the driest (2.5").