Rome weather in September
In September, Rome has an average high of 28 °C82 °F and an average low of 17 °C63 °F, with about 70 mm2.7 in of precipitation. It is the 4th warmest month of the year and ranks 6th for precipitation.
How September compares with other months
Compared with August, September is 4.7 °C8.5 °F cooler on average and wetter by 43 mm1.7 in. Compared with October, September is 4.3 °C7.7 °F warmer on average and drier by 12 mm0.5 in. Daylight lasts about 12.4 hours around the middle of the month. Average relative humidity is 64% and the average cloud amount 37%.
Is September a good time to visit Rome?
Yes — September is one of the most comfortable months to visit Rome by our comfort score, which favours average highs of 21–28 °C, lows above 5 °C, little rain and moderate humidity.
What to wear in September
For Rome in September, pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Rome | 2882 | 1763 | 702.7 |
| Terni | 2781 | 1559 | 712.8 |
| Perugia | 2476 | 1355 | 763.0 |
| Pescara | 2476 | 2170 | 742.9 |
| Arezzo | 2578 | 1456 | 722.8 |
| Naples | 2882 | 1864 | 682.7 |
| San Marino | 2169 | 1456 | 793.1 |
| Salerno | 2781 | 1967 | 632.5 |
| Florence | 2679 | 1559 | 662.6 |
Nearby places that are more than 1 °C1.8 °F cooler: Terni, Perugia, Arezzo and San Marino.
Other months in Rome
- January12 °C54 °F / 4 °C40 °F
- February13 °C55 °F / 4 °C40 °F
- March16 °C61 °F / 7 °C44 °F
- April20 °C68 °F / 10 °C50 °F
- May24 °C76 °F / 14 °C57 °F
- June30 °C85 °F / 18 °C65 °F
- July33 °C92 °F / 21 °C70 °F
- August33 °C92 °F / 21 °C71 °F
- September28 °C82 °F / 17 °C63 °F
- October23 °C74 °F / 14 °C56 °F
- November18 °C64 °F / 10 °C49 °F
- December13 °C56 °F / 5 °C42 °F
Frequently asked questions
How warm is Rome in September?
In September the average high in Rome is 28 °C (82 °F) and the average low is 17 °C (63 °F).
Does it rain a lot in Rome in September?
On average about 70 mm (2.7 in) of precipitation falls in September; it ranks 6th of the 12 months.
Is September the warmest month in Rome?
No. The warmest month in Rome is August, with an average high of 33 °C (92 °F). The coldest month is January, with an average low of 4 °C (40 °F).
How long is the day in Rome in September?
In the middle of September the day in Rome lasts about 12.4 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Rome in September?
The average relative humidity in September is about 64%. This is a long-term average for the whole day.
How cloudy is Rome in September?
On average about 37% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 198 m, while Rome lies at about 20 m. Temperatures on this page were therefore adjusted by +1.2 °C2.1 °F using the standard lapse rate of 6.5 °C per 1,000 m.