Cannes weather in September
September in Cannes: warm, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Cannes · #284 of 897 destinations to visit in September · comfort 87/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Cannes in September
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Cannes climate normals — September
| Daytime high | 25°C / 77°F | 🌤 warm |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Rainfall | 47 mm / 1.9 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 72% | 💧 humid |
| Dew point | 16°C / 61°F | |
| Sunshine | 10.6 h/day | |
| Daylight | 12.5 h | |
| Wind | 17 km/h / 10 mph | |
| Air quality (US AQI) | 49 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Cannes in September — FAQ
- Is September a good time to visit Cannes?
- September in Cannes: warm, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Cannes on SeasonMap's comfort score (87/100).
- What is the weather like in Cannes in September?
- In September, Cannes averages a daily high of 25.2°C and a low of 18°C, with about 47.1 mm of rain over roughly 7 rainy days.
- What is the air quality in Cannes in September?
- Cannes has a mean US Air Quality Index of about 49 in September.