The climate in Monterotondo Marittimo during September can be summarized as warm and reasonably dry.
September is in the fall / autumn in Monterotondo Marittimo and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 23°C (74°F), whilst at night 15°C (59°F) is normal.
| Daytime temperature | 23.3°C 73.9°F |
|---|---|
| Nightly temperature | 15°C 58.9°F |
| Average temperature | 19.1°C 66.4°F |
| Daily sunshine | 7.5 hrs |
| Avg rainfall | 66 mm 2.6 ins |
| Rainy days | 9 days |
| Sea temperature | 22.7°C 72.9°F |
| Humidity | 73% |
| Windspeed | 9.4kph 6 mph |
On average September is the 3rd wettest month of the year in Monterotondo Marittimo with around 66mm 2.6 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.5 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Monterotondo Marittimo in September 2025.
Best places to visit in September
| Hottest month: | July | 26.9°C 80.4°F |
|---|---|---|
| Driest month: | July | 29mm 1.1ins |
| Sunniest month: | July | 10.1hrs |
| Coldest month: | January | 8.8°C 47.8°F |
| Wettest month: | November | 92mm 3.6ins |