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Weather & Climate in Colliano, Italy
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Colliano enjoys a temperate climate with an average annual temperature of 58°F (14°C). Winters average 44°F in January while summers reach 78°F in July. The area gets 292 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 44.9 inches. The area receives 18.3 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 2,067 feet.
Temperature
44°F Jan (6°C)
78°F Jul (25°C)
| Annual Average | 58.0°F |
| 7% above US avg | |
| January Average | 44°F (6°C) |
| July Average | 78°F (25°C) |
| Sunny Days | 292 days/yr |
Geography
| Elevation | 2,067 ft (630 m) |
| Area | 22.8 sq mi (59.1 km²) |
| Population Density | 62/sq mi |
| Coordinates | 40.7229°N, 15.2897°W |
| Timezone | Europe/Rome |
Precipitation & Snow
Air Quality
Earthquake History
673 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.9.
| Oct 31, 2002 | 4 km WSW of Larino, Italy | M5.9 | 124 km | 10 km |
| May 5, 1990 | 6 km NE of Avigliano, Italy | M5.8 | 41 km | 10 km |
| Nov 1, 2002 | 2 km ESE of Casacalenda, Italy | M5.8 | 117 km | 10 km |
| Sep 9, 1998 | 2 km NNE of Castelluccio Superiore, Italy | M5.6 | 96 km | 10 km |
| Feb 26, 1991 | 52 km SW of Anacapri, Italy | M5.3 | 138 km | 401 km |
| Oct 25, 2012 | 2 km SE of Mormanno, Italy | M5.3 | 112 km | 6 km |
| Sep 30, 1995 | 3 km S of Ischitella, Italy | M5.2 | 138 km | 25 km |
| May 1, 2023 | 33 km WSW of Cittadella del Capo, Italy | M5.2 | 144 km | 250 km |
| May 26, 1991 | 3 km E of Avigliano, Italy | M5.1 | 40 km | 8 km |
| Mar 21, 1994 | 29 km WSW of Scalea, Italy | M5.1 | 110 km | 279 km |
| Mar 14, 2025 | 14 km NNE of Lesina, Italy | M5.0 | 140 km | 10 km |
| Oct 16, 2012 | 21 km WSW of Scalea, Italy | M4.9 | 110 km | 260 km |
| Oct 12, 1994 | 29 km S of Marina di Camerota, Italy | M4.8 | 109 km | 21 km |
| Nov 23, 2009 | 38 km SSW of Marina di Camerota, Italy | M4.8 | 118 km | 294 km |
| Sep 14, 1999 | 23 km SW of Marina di Camerota, Italy | M4.8 | 99 km | 297 km |
| Mar 28, 2023 | 2 km NNW of Montagano, Italy | M4.7 | 117 km | 7 km |
| Aug 31, 1993 | 18 km WSW of Palinuro, Italy | M4.7 | 85 km | 315 km |
| Sep 2, 2013 | 43 km SSW of Palinuro, Italy | M4.7 | 117 km | 312 km |
| May 29, 2006 | 6 km SE of Carpino, Italy | M4.7 | 130 km | 31 km |
| Apr 3, 1996 | 0 km NNE of Muro Lucano, Italy | M4.7 | 18 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
7 tsunamis recorded within 500 km. Highest wave on record: 5.0 m (16 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1631 | BAY OF NAPLES | Eruption | 5.0 m | 4,000 | 74 km |
| 1906 | TYRRHENIAN SEA | Astronomical | 0.4 m | 350 | 74 km |
| 1805 | CAMPANIA | Earthquake | - | - | 111 km |
| 1731 | TYRRHENIAN SEA | Earthquake | - | 3,600 | 88 km |
| 1627 | GARGANO PENINSULA | Earthquake | - | 5,000 | 112 km |
| 1562 | REGGIO DI CALABRIA | Earthquake | - | - | 31 km |
| 79 | BAY OF NAPLES | Eruption | - | 2,100 | 74 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Vesuvius (74 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Vesuvius | Stratovolcano | 1,281 m (4,203 ft) | 1944 | 74 km |
| Campi Flegrei | Caldera | 458 m (1,503 ft) | 1538 | 98 km |
| Ischia | Complex | 789 m (2,589 ft) | 1302 | 117 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 44°F (6°C) | 3.2 in | |
| February | 41°F (5°C) | 3.0 in | Coldest |
| March | 44°F (7°C) | 2.6 in | |
| April | 49°F (10°C) | 2.7 in | |
| May | 57°F (14°C) | 1.9 in | |
| June | 64°F (18°C) | 1.2 in | |
| July | 78°F (25°C) | 1.1 in | Warmest, Driest |
| August | 69°F (21°C) | 1.3 in | |
| September | 64°F (18°C) | 2.4 in | |
| October | 56°F (13°C) | 3.3 in | |
| November | 48°F (9°C) | 3.9 in | Wettest |
| December | 42°F (6°C) | 3.5 in |
Colliano has a seasonal temperature swing of 37°F / from 41°F in February to 78°F in July. Total annual precipitation is 30.1 inches, with November being the wettest month (3.9") and July the driest (1.1").