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Grosseto, Italy climate
Csa Hot-summer Mediterranean
Grosseto has a seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is August with an average daily high near 32°C, while the coldest is January averaging around 3°C at night. Precipitation totals about 564 mm a year and is strongly seasonal — November alone averages 108 mm while July barely receives 15 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Grosseto climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 13 | 14 | 16 | 19 | 24 | 28 | 31 | 32 | 27 | 22 | 17 | 13 |
| Avg temp (°C) | 8 | 8 | 11 | 13 | 18 | 22 | 25 | 25 | 21 | 17 | 12 | 9 |
| Avg low (°C) | 3 | 3 | 5 | 7 | 11 | 15 | 18 | 18 | 15 | 12 | 8 | 4 |
| Precipitation (mm) | 42 | 43 | 40 | 38 | 37 | 24 | 15 | 24 | 67 | 57 | 108 | 70 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 13 | 14 | 16 | 19 | 24 | 28 |
| Avg temp (°C) | 8 | 8 | 11 | 13 | 18 | 22 |
| Avg low (°C) | 3 | 3 | 5 | 7 | 11 | 15 |
| Precipitation (mm) | 42 | 43 | 40 | 38 | 37 | 24 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 32 | 27 | 22 | 17 | 13 |
| Avg temp (°C) | 25 | 25 | 21 | 17 | 12 | 9 |
| Avg low (°C) | 18 | 18 | 15 | 12 | 8 | 4 |
| Precipitation (mm) | 15 | 24 | 67 | 57 | 108 | 70 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 60 | 59 | 60 | 55 | 42 | 29 | 31 | 48 | 58 | 66 | 65 |
| Relative humidity (%) | 87 | 83 | 78 | 75 | 70 | 64 | 58 | 59 | 68 | 79 | 85 | 87 |
| Wind speed (mph) | 4.4 | 4.6 | 4.7 | 4.2 | 3.8 | 3.5 | 3.6 | 3.4 | 3.8 | 4.1 | 4.3 | 4.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 60 | 59 | 60 | 55 | 42 |
| Relative humidity (%) | 87 | 83 | 78 | 75 | 70 | 64 |
| Wind speed (mph) | 4.4 | 4.6 | 4.7 | 4.2 | 3.8 | 3.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 29 | 31 | 48 | 58 | 66 | 65 |
| Relative humidity (%) | 58 | 59 | 68 | 79 | 85 | 87 |
| Wind speed (mph) | 3.6 | 3.4 | 3.8 | 4.1 | 4.3 | 4.4 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Grosseto, a weather station, about 3 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.