Frosinone Weather in September
What's the weather like in Frosinone (Latium) in September 2025?
The climate in Frosinone during September can be summarized as warm, humid and a little damp.
September is in the fall / autumn in Frosinone and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 26°C (79°F), whilst at night 14°C (58°F) is normal.
| Daytime temperature | 25.9°C 78.5°F |
|---|---|
| Nightly temperature | 14.2°C 57.5°F |
| Average temperature | 20°C 68°F |
| Daily sunshine | 8.2 hrs |
| Avg rainfall | 99 mm 3.9 ins |
| Rainy days | 9 days |
| Sea temperature | 24.5°C 76.1°F |
| Humidity | 71% |
| Windspeed | 7.2kph 5 mph |
On average September is the 6th wettest month of the year in Frosinone with around 99mm 3.9 inches of rain making it a a little damp 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 8.2 hours of sunshine per day.
September temperatures in Frosinone
September rainfall
September hourly sunshine
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 Frosinone in September 2025.
Other monthly averages
Best places to visit in September
Frosinone weather stats
| Hottest month: | August | 29°C 84.2°F |
|---|---|---|
| Driest month: | July | 35mm 1.4ins |
| Sunniest month: | July | 10.9hrs |
| Coldest month: | January | 10.5°C 50.9°F |
| Wettest month: | November | 175mm 6.9ins |
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