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Weather & Climate in Isola, Italy
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Isola experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 34°F in January while summers reach 68°F in July. The area gets 287 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 66.8 inches (wetter than the 38-inch national average). The area receives 41.1 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 1,542 feet.
Temperature
34°F Jan (1°C)
68°F Jul (20°C)
| Annual Average | 51.6°F |
| 4% below US avg | |
| January Average | 34°F (1°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 287 days/yr |
Geography
| Elevation | 1,542 ft (470 m) |
| Area | 15.8 sq mi (40.9 km²) |
| Population Density | 13/sq mi |
| Coordinates | 46.2557°N, 13.1791°W |
| Timezone | Europe/Rome |
Precipitation & Snow
Air Quality
Earthquake History
927 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.6.
| Apr 12, 1998 | 5 km E of Kobarid, Slovenia | M5.6 | 36 km | 10 km |
| Mar 13, 1998 | 4 km NW of Ilirska Bistrica, Slovenia | M5.2 | 108 km | 10 km |
| Jul 12, 2004 | 7 km NE of Kobarid, Slovenia | M5.2 | 36 km | 8 km |
| May 22, 1995 | 6 km NNW of Ilirska Bistrica, Slovenia | M4.9 | 108 km | 27 km |
| Feb 14, 2002 | 4 km SSW of Moggio di Sotto, Italy | M4.7 | 13 km | 10 km |
| Jul 21, 2003 | 3 km WNW of Niederwölz, Austria | M4.7 | 134 km | 10 km |
| Nov 11, 1990 | 5 km ENE of Cerkno, Slovenia | M4.7 | 69 km | 22 km |
| May 6, 1998 | 6 km NNW of Tolmin, Slovenia | M4.6 | 41 km | 10 km |
| Jun 2, 2002 | 6 km SSE of Pivka, Slovenia | M4.6 | 107 km | 10 km |
| Jun 9, 2012 | 5 km NE of Lamosano, Italy | M4.5 | 57 km | 7 km |
| Apr 22, 2014 | 7 km SE of Pivka, Slovenia | M4.5 | 108 km | 5 km |
| Oct 5, 1991 | 0 km W of Nimis, Italy | M4.5 | 9 km | 10 km |
| May 28, 1998 | 3 km WSW of Osoppo, Italy | M4.5 | 11 km | 10 km |
| Mar 13, 2014 | 9 km E of Ribnica, Slovenia | M4.4 | 141 km | 2 km |
| May 13, 1999 | 2 km NW of Clodig, Italy | M4.4 | 31 km | 10 km |
| Apr 24, 2005 | 0 km NNW of Ilirska Bistrica, Slovenia | M4.4 | 112 km | 10 km |
| Nov 28, 1993 | 3 km WNW of Klana, Croatia | M4.4 | 126 km | 5 km |
| Jan 30, 2015 | 4 km W of Moggio di Sotto, Italy | M4.4 | 17 km | 6 km |
| Jul 13, 2020 | 9 km SSW of Forni di Sotto, Italy | M4.3 | 44 km | 10 km |
| Apr 20, 1994 | 5 km NE of Claut, Italy | M4.3 | 47 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 235.0 m (771 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1963 | VAJONT DAM, VAJONT RIVER | Meteorological | 235.0 m | 2,000 | 65 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 34°F (1°C) | 4.8 in | Coldest |
| February | 35°F (2°C) | 3.4 in | Driest |
| March | 41°F (5°C) | 5.2 in | |
| April | 48°F (9°C) | 6.9 in | |
| May | 57°F (14°C) | 7.1 in | |
| June | 63°F (17°C) | 7.4 in | |
| July | 68°F (20°C) | 6.0 in | Warmest |
| August | 67°F (19°C) | 5.6 in | |
| September | 60°F (16°C) | 7.1 in | |
| October | 51°F (11°C) | 8.6 in | Wettest |
| November | 41°F (5°C) | 7.7 in | |
| December | 34°F (1°C) | 5.9 in |
Isola has a seasonal temperature swing of 34°F / from 34°F in January to 68°F in July. Total annual precipitation is 75.7 inches, with October being the wettest month (8.6") and February the driest (3.4").