The climate in Rome during September can be summarized as warm, humid and reasonably dry.
September is in the fall / autumn in Rome and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 15°C (59°F) is normal.
| Daytime temperature | 26.8°C 80.2°F |
|---|---|
| Nightly temperature | 15.1°C 59.1°F |
| Average temperature | 20.9°C 69.6°F |
| Daily sunshine | 8.6 hrs |
| Avg rainfall | 75 mm 3 ins |
| Rainy days | 9 days |
| Sea temperature | 24.3°C 75.8°F |
| Humidity | 72% |
| Windspeed | 7.2kph 5 mph |
On average September is the 5th wettest month of the year in Rome with around 75mm 3 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 8.6 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 Rome in September 2025.
Best places to visit in September
| Hottest month: | July | 29.8°C 85.6°F |
|---|---|---|
| Driest month: | July | 19mm 0.7ins |
| Sunniest month: | July | 11.6hrs |
| Coldest month: | January | 11.9°C 53.4°F |
| Wettest month: | November | 117mm 4.6ins |