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Weather & Climate in Castelletto Merli, Italy
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Castelletto Merli enjoys a temperate climate with an average annual temperature of 56°F (14°C). Winters average 38°F in January while summers reach 75°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 33.6 inches. The area receives 4.8 inches of snow annually. The city sits at an elevation of 876 feet.
Temperature
38°F Jan (4°C)
75°F Jul (24°C)
| Annual Average | 56.3°F |
| 4% above US avg | |
| January Average | 38°F (4°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 287 days/yr |
Geography
| Elevation | 876 ft (267 m) |
| Area | 45.9 sq mi (119.0 km²) |
| Population Density | 10/sq mi |
| Coordinates | 45.0740°N, 8.2401°W |
| Timezone | Europe/Rome |
Precipitation & Snow
Air Quality
Earthquake History
2,377 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.0.
| Apr 11, 2003 | 1 km SSW of Carezzano Maggiore, Italy | M5.0 | 60 km | 4 km |
| Apr 18, 2005 | 2 km WSW of Marsaglia, Italy | M4.9 | 96 km | 0 km |
| Aug 21, 2000 | 1 km WNW of Oviglio, Italy | M4.9 | 30 km | 10 km |
| Oct 29, 1995 | 0 km WNW of Adro, Italy | M4.9 | 147 km | 10 km |
| Apr 7, 2014 | 7 km SE of Guillestre, France | M4.8 | 132 km | 8 km |
| Mar 5, 2012 | 3 km NNW of Santo Stefano d'Aveto, Italy | M4.7 | 110 km | 9 km |
| Jul 18, 2001 | 3 km S of Masio, Italy | M4.7 | 29 km | 0 km |
| Jan 20, 1994 | 1 km NE of Melle, Italy | M4.6 | 91 km | 10 km |
| Aug 13, 2019 | 4 km SW of Stazione Valmozzola, Italy | M4.6 | 143 km | 10 km |
| Feb 11, 1991 | 5 km ESE of Briançon, France | M4.6 | 123 km | 14 km |
| Oct 3, 2012 | 1 km WSW of Lugagnano Val d'Arda, Italy | M4.5 | 127 km | 22 km |
| Apr 16, 2020 | 2 km SE of Marsaglia, Italy | M4.5 | 101 km | 10 km |
| Oct 3, 2012 | 2 km N of Melle, Italy | M4.5 | 91 km | 10 km |
| Apr 19, 2009 | 1 km ENE of Bandito, Italy | M4.5 | 50 km | 40 km |
| Jul 17, 1993 | 0 km NNW of Calice Ligure, Italy | M4.5 | 96 km | 5 km |
| Mar 2, 2012 | 8 km NNW of Jausiers, France | M4.5 | 138 km | 10 km |
| Sep 22, 2022 | 3 km SW of Bargagli, Italy | M4.4 | 97 km | 10 km |
| Jul 17, 1993 | 0 km NNE of Calice Ligure, Italy | M4.4 | 96 km | 5 km |
| Jul 25, 2011 | 5 km NW of Cantalupa, Italy | M4.4 | 76 km | 25 km |
| Jun 14, 1993 | 3 km S of Vogogna, Italy | M4.4 | 101 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 3.0 m (10 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1968 | LIGURIA-COTE D'AZUR | Earthquake | 3.0 m | — | 112 km |
| 1564 | LIGURIA-COTE D'AZUR | Eruption + Earthquake | — | 650 | 140 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 38°F (4°C) | 1.7 in | |
| February | 40°F (4°C) | 1.7 in | |
| March | 47°F (8°C) | 2.4 in | |
| April | 53°F (12°C) | 3.0 in | |
| May | 61°F (16°C) | 3.6 in | Wettest |
| June | 67°F (20°C) | 2.4 in | |
| July | 75°F (24°C) | 1.5 in | Warmest |
| August | 72°F (22°C) | 2.6 in | |
| September | 65°F (18°C) | 2.2 in | |
| October | 55°F (13°C) | 3.2 in | |
| November | 44°F (7°C) | 2.3 in | |
| December | 38°F (3°C) | 1.5 in | Coldest, Driest |
Castelletto Merli has a seasonal temperature swing of 37°F / from 38°F in December to 75°F in July. Total annual precipitation is 28.2 inches, with May being the wettest month (3.6") and December the driest (1.5").