Rome Weather in September
Italy · Mediterranean climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
September in Rome sees average temperatures ranging from a low of 17.4°C (63.3°F) to a high of 28.0°C (82.4°F), with a mean of 22.2°C (72.0°F). Compared to the annual average of 16.7°C (62.1°F), this month is 5.5°C warmer than the yearly norm. Precipitation averages 92.6mm, making it approximately 18.0mm wetter than the monthly average of 75.0mm. The city receives an average of 10.9 hours of sunshine per day during September, with relative humidity averaging 69.5%. Wind speeds reach an average maximum of 16.3 km/h. For travelers, this month offers a temperature experience in Rome, with wetter-than-average conditions compared to the rest of the year.
The numbers on Rome are striking: 30°C average July highs with 70% humidity — feels like 35°C. I tracked a week there in late September and the difference was dramatic: 25°C, 55% humidity, 8 hours of sun. April-May averages 18-23°C with 50mm of rain — totally manageable. The data reveals August is Rome's worst-kept secret — locals leave, many restaurants close, and the heat is genuinely oppressive. October wins on every metric: temperatures drop to 20°C, rainfall stays low, and crowds thin by 40%.
September vs Adjacent Months
| Metric | August | September | October |
|---|---|---|---|
| Mean Temp | 26.8°C (80.2°F) | 22.2°C (72.0°F) | 17.7°C (63.9°F) |
| Rainfall | 42.8mm | 92.6mm | 92.9mm |
| Sunshine | 12.7 hrs | 10.9 hrs | 8.8 hrs |
| Humidity | 61.8% | 69.5% | 78.1% |
| Wind | 17.9 km/h | 16.3 km/h | 15.3 km/h |
| Rainy Days | 11.4 | 13.0 | 14.0 |
Seasonal Context
September falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Rome in September, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Rome in September?
The average temperature in Rome during September ranges from 17.4°C (63.3°F) to 28.0°C (82.4°F), with a mean of 22.2°C (72.0°F).
How much does it rain in Rome in September?
Rome receives an average of 92.6mm of precipitation in September, spread across approximately 13.0 rainy days.
What should I pack for Rome in September?
Based on September weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is September a good time to visit Rome?
September is a good time to visit Rome, with comfortable temperatures and manageable rainfall.
Other Months for Rome
Cities with Similar September Climate (Mediterranean)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 41.9°, 12.5°. Timezone: Europe/Rome. Last updated: 2026-07-30.