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Weather & Climate in Formia, Italy
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Formia enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 43°F in January while summers reach 79°F in July. The area gets 309 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 43.0 inches. The area receives 2.1 inches of snow annually. The city sits at an elevation of 62 feet.
Temperature
43°F Jan (6°C)
79°F Jul (26°C)
| Annual Average | 58.6°F |
| 9% above US avg | |
| January Average | 43°F (6°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 309 days/yr |
Geography
| Elevation | 62 ft (19 m) |
| Area | 34.1 sq mi (88.3 km²) |
| Population Density | 836/sq mi |
| Coordinates | 41.2563°N, 13.6089°W |
| Timezone | Europe/Rome |
Precipitation & Snow
Air Quality
Earthquake History
520 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 | 121 km | 10 km |
| Nov 1, 2002 | 2 km ESE of Casacalenda, Italy | M5.8 | 118 km | 10 km |
| Apr 7, 2009 | 1 km SW of San Panfilo d'Ocre, Italy | M5.5 | 114 km | 15 km |
| Apr 9, 2009 | 5 km SE of Capitignano, Italy | M5.4 | 138 km | 15 km |
| Feb 26, 1991 | 52 km SW of Anacapri, Italy | M5.3 | 120 km | 401 km |
| Apr 9, 2009 | 2 km ESE of Capitignano, Italy | M5.2 | 142 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 | 134 km | 9 km |
| Apr 13, 2009 | 5 km ESE of Capitignano, Italy | M5.0 | 140 km | 8 km |
| Dec 21, 1996 | 90 km SSW of Ventotene, Italy | M4.9 | 144 km | 488 km |
| Apr 6, 2009 | 0 km WSW of Coppito, Italy | M4.9 | 125 km | 10 km |
| Apr 7, 2009 | 1 km SW of L'Aquila, Italy | M4.8 | 122 km | 10 km |
| Feb 16, 2013 | 3 km W of Sora, Italy | M4.8 | 51 km | 11 km |
| Aug 15, 1998 | 3 km NE of Cittaducale, Italy | M4.8 | 138 km | 10 km |
| Apr 6, 2009 | 5 km NW of Scoppito, Italy | M4.8 | 132 km | 5 km |
| Mar 28, 2023 | 2 km NNW of Montagano, Italy | M4.7 | 99 km | 7 km |
| Jun 22, 2009 | 4 km ENE of Pizzoli, Italy | M4.7 | 134 km | 14 km |
| Jan 21, 1996 | 87 km SSW of Ventotene, Italy | M4.7 | 141 km | 459 km |
| Mar 11, 2000 | southern Italy | M4.7 | 95 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
4 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 | 84 km |
| 1906 | TYRRHENIAN SEA | Astronomical | 0.4 m | 350 | 84 km |
| 1805 | CAMPANIA | Earthquake | - | - | 77 km |
| 79 | BAY OF NAPLES | Eruption | - | 2,100 | 84 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Ischia (63 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Ischia | Complex | 789 m (2,589 ft) | 1302 | 63 km |
| Campi Flegrei | Caldera | 458 m (1,503 ft) | 1538 | 65 km |
| Vesuvius | Stratovolcano | 1,281 m (4,203 ft) | 1944 | 84 km |
| Colli Albani | Caldera | 949 m (3,114 ft) | Unknown | 92 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 43°F (6°C) | 3.4 in | Coldest |
| February | 43°F (6°C) | 3.2 in | |
| March | 47°F (8°C) | 2.8 in | |
| April | 51°F (11°C) | 3.1 in | |
| May | 60°F (15°C) | 2.2 in | |
| June | 66°F (19°C) | 1.4 in | |
| July | 79°F (26°C) | 1.2 in | Warmest, Driest |
| August | 73°F (23°C) | 1.9 in | |
| September | 66°F (19°C) | 3.3 in | |
| October | 59°F (15°C) | 4.7 in | |
| November | 50°F (10°C) | 5.4 in | Wettest |
| December | 44°F (7°C) | 4.2 in |
Formia has a seasonal temperature swing of 36°F / from 43°F in January to 79°F in July. Total annual precipitation is 36.6 inches, with November being the wettest month (5.4") and July the driest (1.2").