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Weather & Climate in San Clemente, Italy
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Clemente experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 40°F in January while summers reach 74°F in July. The area gets 311 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 54.2 inches (wetter than the 38-inch national average). The area receives 8.9 inches of snow annually. The city sits at an elevation of 1,207 feet.
Temperature
40°F Jan (4°C)
74°F Jul (24°C)
| Annual Average | 54.9°F |
| 2% above US avg | |
| January Average | 40°F (4°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 311 days/yr |
Geography
| Elevation | 1,207 ft (368 m) |
| Area | 98.5 sq mi (255.0 km²) |
| Population Density | 9/sq mi |
| Coordinates | 41.3403°N, 13.9560°W |
| Timezone | Europe/Rome |
Precipitation & Snow
Air Quality
Earthquake History
601 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.3.
| Apr 6, 2009 | 3 km SE of Sassa, Italy | M6.3 | 122 km | 9 km |
| Oct 31, 2002 | 4 km WSW of Larino, Italy | M5.9 | 91 km | 10 km |
| Nov 1, 2002 | 2 km ESE of Casacalenda, Italy | M5.8 | 88 km | 10 km |
| Apr 7, 2009 | 1 km SW of San Panfilo d'Ocre, Italy | M5.5 | 112 km | 15 km |
| Apr 9, 2009 | 5 km SE of Capitignano, Italy | M5.4 | 137 km | 15 km |
| Feb 26, 1991 | 52 km SW of Anacapri, Italy | M5.3 | 129 km | 401 km |
| Apr 9, 2009 | 2 km ESE of Capitignano, Italy | M5.2 | 140 km | 3 km |
| Jan 18, 2017 | 3 km N of Montereale, Italy | M5.2 | 148 km | 7 km |
| Apr 6, 2009 | 5 km ENE of Pizzoli, Italy | M5.1 | 133 km | 9 km |
| Mar 14, 2025 | 14 km NNE of Lesina, Italy | M5.0 | 142 km | 10 km |
| Apr 13, 2009 | 5 km ESE of Capitignano, Italy | M5.0 | 138 km | 8 km |
| Apr 6, 2009 | 0 km WSW of Coppito, Italy | M4.9 | 125 km | 10 km |
| Apr 6, 2009 | 5 km NW of Scoppito, Italy | M4.8 | 133 km | 5 km |
| Feb 16, 2013 | 3 km W of Sora, Italy | M4.8 | 52 km | 11 km |
| Apr 7, 2009 | 1 km SW of L'Aquila, Italy | M4.8 | 121 km | 10 km |
| Aug 15, 1998 | 3 km NE of Cittaducale, Italy | M4.8 | 144 km | 10 km |
| Sep 21, 2019 | 4 km WNW of Agropoli, Italy | M4.7 | 136 km | 300 km |
| Mar 11, 2000 | southern Italy | M4.7 | 109 km | 10 km |
| Jun 22, 2009 | 4 km ENE of Pizzoli, Italy | M4.7 | 133 km | 14 km |
| Jan 18, 2017 | 4 km WNW of Campotosto, Italy | M4.7 | 148 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
6 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 | 70 km |
| 1906 | TYRRHENIAN SEA | Astronomical | 0.4 m | 350 | 70 km |
| 1805 | CAMPANIA | Earthquake | — | — | 46 km |
| 1731 | TYRRHENIAN SEA | Earthquake | — | 3,600 | 130 km |
| 1627 | GARGANO PENINSULA | Earthquake | — | 5,000 | 124 km |
| 79 | BAY OF NAPLES | Eruption | — | 2,100 | 70 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Campi Flegrei (59 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Campi Flegrei | Caldera | 458 m (1,503 ft) | 1538 | 59 km |
| Ischia | Complex | 789 m (2,589 ft) | 1302 | 68 km |
| Vesuvius | Stratovolcano | 1,281 m (4,203 ft) | 1944 | 70 km |
| Colli Albani | Caldera | 949 m (3,114 ft) | Unknown | 113 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (4°C) | 3.4 in | Coldest |
| February | 44°F (7°C) | 3.0 in | |
| March | 48°F (9°C) | 2.8 in | |
| April | 53°F (12°C) | 2.9 in | |
| May | 61°F (16°C) | 2.0 in | |
| June | 68°F (20°C) | 1.5 in | |
| July | 74°F (24°C) | 1.2 in | Warmest, Driest |
| August | 74°F (23°C) | 2.0 in | |
| September | 68°F (20°C) | 3.1 in | |
| October | 60°F (15°C) | 4.3 in | |
| November | 51°F (10°C) | 5.2 in | Wettest |
| December | 45°F (7°C) | 4.1 in |
San Clemente has a seasonal temperature swing of 35°F / from 40°F in January to 74°F in July. Total annual precipitation is 35.4 inches, with November being the wettest month (5.2") and July the driest (1.2").