Florence weather in September
September in Florence: warm, rainy, with clean air — one of the best months to visit.
#1 of 12 months in Florence · #113 of 604 destinations to visit in September · comfort 88/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Florence climate normals — September
| Daytime high | 26°C / 79°F | 🌤 warm |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 90 mm / 3.5 in | 🌧 rainy |
| Rainy days | 8 days | |
| Humidity | 71% | 💧 humid |
| Dew point | 15°C / 59°F | |
| Sunshine | 10.3 h/day | |
| Daylight | 12.5 h | |
| Wind | 12 km/h / 7 mph | |
| Air quality (US AQI) | 44 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Florence in September — FAQ
- Is September a good time to visit Florence?
- September in Florence: warm, rainy, with clean air — one of the best months to visit. It ranks #1 of 12 months for Florence on SeasonMap's comfort score (88/100).
- What is the weather like in Florence in September?
- In September, Florence averages a daily high of 26.1°C and a low of 15.5°C, with about 89.6 mm of rain over roughly 8.4 rainy days.
- What is the air quality in Florence in September?
- Florence has a mean US Air Quality Index of about 44 in September.