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Weather & Climate in Fonte Umano-San Martino Alta, Italy
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Fonte Umano-San Martino Alta enjoys a temperate climate with an average annual temperature of 61°F (16°C). Winters average 46°F in January while summers reach 80°F in July. The area gets 305 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 37.1 inches. The area receives 4.9 inches of snow annually. The city sits at an elevation of 374 feet.
Temperature
46°F Jan (8°C)
80°F Jul (27°C)
| Annual Average | 60.9°F |
| 13% above US avg | |
| January Average | 46°F (8°C) |
| July Average | 80°F (27°C) |
| Sunny Days | 305 days/yr |
Geography
| Elevation | 374 ft (114 m) |
| Area | 24.2 sq mi (62.5 km²) |
| Population Density | 72/sq mi |
| Coordinates | 42.5208°N, 14.1076°W |
| Timezone | Europe/Rome |
Precipitation & Snow
Air Quality
Earthquake History
1,757 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 | 67 km | 9 km |
| Aug 24, 2016 | 5 km WNW of Accumoli, Italy | M6.2 | 79 km | 4 km |
| Sep 26, 1997 | 3 km SSE of Nocera Umbra, Italy | M6.0 | 123 km | 10 km |
| Oct 31, 2002 | 4 km WSW of Larino, Italy | M5.9 | 103 km | 10 km |
| Nov 1, 2002 | 2 km ESE of Casacalenda, Italy | M5.8 | 109 km | 10 km |
| Jan 18, 2017 | 5 km ESE of Cittareale, Italy | M5.7 | 73 km | 7 km |
| Sep 26, 1997 | 6 km WSW of Serravalle di Chienti, Italy | M5.7 | 116 km | 10 km |
| Aug 24, 2016 | 5 km S of Castelsantangelo sul Nera, Italy | M5.6 | 86 km | 3 km |
| Jan 18, 2017 | 4 km SE of Cittareale, Italy | M5.6 | 76 km | 10 km |
| Apr 7, 2009 | 1 km SW of San Panfilo d'Ocre, Italy | M5.5 | 60 km | 15 km |
| Mar 29, 2003 | 51 km W of Komiža, Croatia | M5.5 | 129 km | 10 km |
| Oct 14, 1997 | 8 km NNW of Sellano, Italy | M5.5 | 111 km | 10 km |
| Oct 6, 1997 | 6 km E of Valtopina, Italy | M5.5 | 119 km | 10 km |
| Mar 26, 1998 | 1 km E of Esanatoglia, Italy | M5.4 | 124 km | 10 km |
| Jul 21, 2013 | 3 km ENE of Marcelli, Italy | M5.4 | 115 km | 8 km |
| Apr 9, 2009 | 5 km SE of Capitignano, Italy | M5.4 | 63 km | 15 km |
| Jan 18, 2017 | 4 km SW of Accumoli, Italy | M5.3 | 75 km | 10 km |
| Oct 3, 1997 | 3 km ENE of Valtopina, Italy | M5.3 | 124 km | 10 km |
| Oct 12, 1997 | 2 km NW of Sellano, Italy | M5.3 | 108 km | 10 km |
| Apr 3, 1998 | 8 km E of Valfabbrica, Italy | M5.2 | 135 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1805 | CAMPANIA | Earthquake | — | — | 117 km |
| 1627 | GARGANO PENINSULA | Earthquake | — | 5,000 | 135 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Colli Albani (146 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Colli Albani | Caldera | 949 m (3,114 ft) | Unknown | 146 km |
| Vulsini | Caldera | 800 m (2,625 ft) | -104 | 179 km |
| Campi Flegrei | Caldera | 458 m (1,503 ft) | 1538 | 188 km |
| Vesuvius | Stratovolcano | 1,281 m (4,203 ft) | 1944 | 191 km |
| Ischia | Complex | 789 m (2,589 ft) | 1302 | 200 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 46°F (8°C) | 1.9 in | |
| February | 44°F (7°C) | 1.9 in | Coldest |
| March | 48°F (9°C) | 2.2 in | |
| April | 53°F (12°C) | 2.3 in | |
| May | 62°F (17°C) | 1.5 in | Driest |
| June | 69°F (21°C) | 2.2 in | |
| July | 80°F (27°C) | 1.5 in | Warmest |
| August | 74°F (23°C) | 2.3 in | |
| September | 68°F (20°C) | 2.7 in | |
| October | 59°F (15°C) | 3.0 in | |
| November | 51°F (10°C) | 3.1 in | Wettest |
| December | 45°F (7°C) | 2.6 in |
Fonte Umano-San Martino Alta has a seasonal temperature swing of 36°F / from 44°F in February to 80°F in July. Total annual precipitation is 27.2 inches, with November being the wettest month (3.1") and May the driest (1.5").