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Weather & Climate in Grosseto, Italy
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Grosseto enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 46°F in January while summers reach 75°F in July. The area gets 291 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 24.8 inches (drier than the 38-inch national average). The city sits at an elevation of 33 feet.
Temperature
46°F Jan (8°C)
75°F Jul (24°C)
| Annual Average | 58.8°F |
| 9% above US avg | |
| January Average | 46°F (8°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 291 days/yr |
Geography
| Elevation | 33 ft (10 m) |
| Area | 294.4 sq mi (762.6 km²) |
| Population Density | 207/sq mi |
| Coordinates | 42.7630°N, 11.1094°W |
| Timezone | Europe/Rome |
Precipitation & Snow
Air Quality
Earthquake History
1,059 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.0.
| Sep 26, 1997 | 3 km SSE of Nocera Umbra, Italy | M6.0 | 143 km | 10 km |
| Sep 26, 1997 | 6 km WSW of Serravalle di Chienti, Italy | M5.7 | 148 km | 10 km |
| Oct 14, 1997 | 8 km NNW of Sellano, Italy | M5.5 | 147 km | 10 km |
| Oct 6, 1997 | 6 km E of Valtopina, Italy | M5.5 | 144 km | 10 km |
| Oct 3, 1997 | 3 km ENE of Valtopina, Italy | M5.3 | 142 km | 10 km |
| Oct 12, 1997 | 2 km NW of Sellano, Italy | M5.3 | 147 km | 10 km |
| Apr 3, 1998 | 8 km E of Valfabbrica, Italy | M5.2 | 137 km | 10 km |
| Sep 18, 2023 | 7 km SE of Marradi, Italy | M5.1 | 147 km | 10 km |
| Jun 5, 1993 | 7 km ESE of Valfabbrica, Italy | M4.9 | 134 km | 8 km |
| Oct 16, 1997 | 8 km ESE of Valtopina, Italy | M4.8 | 144 km | 10 km |
| Mar 1, 2008 | 6 km NNW of Galliano, Italy | M4.8 | 145 km | 4 km |
| Jun 22, 2000 | 8 km WSW of Cipolleto, Italy | M4.8 | 126 km | 10 km |
| Sep 3, 1997 | 6 km ESE of Valtopina, Italy | M4.7 | 143 km | 10 km |
| Apr 5, 1998 | 6 km SW of Gualdo Tadino, Italy | M4.7 | 139 km | 10 km |
| Oct 16, 1997 | 2 km N of Sellano, Italy | M4.7 | 149 km | 10 km |
| Sep 26, 1997 | 6 km NNW of Nocera Umbra, Italy | M4.7 | 141 km | 10 km |
| Jan 26, 2003 | 3 km NNW of San Piero in Bagno, Italy | M4.7 | 142 km | 7 km |
| Jan 26, 2003 | 2 km NW of San Piero in Bagno, Italy | M4.7 | 141 km | 7 km |
| Mar 1, 2008 | 4 km ENE of Mercatale-San Quirico, Italy | M4.6 | 144 km | 6 km |
| Mar 1, 2008 | 5 km N of Barberino di Mugello, Italy | M4.6 | 143 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
4 tsunamis recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1846 | LIVORNO | Earthquake | - | 56 | 82 km |
| 1846 | TUSCANY | Earthquake | - | - | 96 km |
| 1742 | LIVORNO | Earthquake | - | - | 110 km |
| 1646 | LIVORNO | Earthquake | - | - | 109 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Vulsini (70 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Vulsini | Caldera | 800 m (2,625 ft) | -104 | 70 km |
| Colli Albani | Caldera | 949 m (3,114 ft) | Unknown | 174 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 46°F (8°C) | 2.1 in | Coldest |
| February | 46°F (8°C) | 2.0 in | |
| March | 50°F (10°C) | 2.0 in | |
| April | 54°F (12°C) | 1.9 in | |
| May | 62°F (17°C) | 1.7 in | |
| June | 69°F (21°C) | 1.0 in | |
| July | 75°F (24°C) | 0.7 in | Driest |
| August | 75°F (24°C) | 1.5 in | Warmest |
| September | 69°F (21°C) | 3.0 in | |
| October | 61°F (16°C) | 3.1 in | |
| November | 53°F (11°C) | 3.5 in | Wettest |
| December | 47°F (8°C) | 2.4 in |
Grosseto has a seasonal temperature swing of 30°F / from 46°F in January to 75°F in August. Total annual precipitation is 24.8 inches, with November being the wettest month (3.5") and July the driest (0.7").