SeasonMapNantes weather in September
France
September in Nantes: nice, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Nantes · #273 of 1383 destinations to visit in September · comfort 89/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Nantes in September
Other months in Nantes
Nantes's forum rates summer, roughly May through September, as the pleasant stretch for a visit, with July generally good for both the city and nearby coastal Brittany. Regulars note Nantes sits close enough to the Atlantic that a hot spell can be escaped with a short train ride to the seaside, and flag the region's weather as genuinely changeable year to year given its exposure to Atlantic systems.
Add your own note from Nantes's card on the map.
Nantes climate normals — September
| Daytime high | 23°C / 74°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Feels like (high) | 22°C / 72°F | |
| Rainfall | 58 mm / 2.3 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 12°C / 54°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 12.6 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Nantes in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Nantes's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherNantes's weather peaks June–August.
Best weatherFair weatherToughest weather
What's on in Nantes in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Festival
Le Voyage a Nantes
4 Jul – 6 SepSummer season opensA green line painted on the pavement links a couple of dozen commissioned works across the city for the summer, most of them free and outdoors. The art changes every year; the line does not. Source ↗
- Season
Muscadet harvest
1 Sep – 10 Oct · usuallyThe vineyards start where the tram ends, and picking runs through September in the villages around Clisson and Vallet. Growers pour in the cellar rather than the tasting room while it lasts.
Nearby, and something's on
Within 300 km of Nantes — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Nantes?
Nantes in September — FAQ
- Is September a good time to visit Nantes?
- September in Nantes: nice, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Nantes on SeasonMap's comfort score (89/100).
- What is the weather like in Nantes in September?
- In September, Nantes averages a daily high of 23.1°C and a low of 12.4°C, with about 57.9 mm of rain over roughly 8.7 rainy days.
- What is the air quality in Nantes in September?
- Nantes has a mean US Air Quality Index of about 35 in September.
Other months in Nantes
Compare Nantes in September
Warmer or cooler than Nantes in September
Similar destinations in Western Europe — September
Within 300 km: La Rochelle's Atlantic swimming season around 25 Jun – 20 Sep, and Bordeaux's Oyster season on the Bassin around 1 Sep – 30 Apr.