SeasonMapCarcassonne weather in September
France
September in Carcassonne: warm, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Carcassonne · #120 of 1383 destinations to visit in September · comfort 92/100 (tier S)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Carcassonne in September
Carcassonne's forum is candid that September can go either way — hot or cool, wet or dry, with daytime temperatures sometimes still over 30°C but without July and August's oppressive nights. Regulars flag the near-constant wind as a defining feature of the city year-round, worth a windproof layer regardless of the temperature.
Add your own note from Carcassonne's card on the map.
Carcassonne climate normals — September
| Daytime high | 27°C / 80°F | 🌤 warm |
|---|---|---|
| Nighttime low | 14°C / 57°F | |
| Feels like (high) | 26°C / 79°F | |
| Rainfall | 48 mm / 1.9 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 69% | 💧 humid |
| Dew point | 13°C / 56°F | |
| Sunshine | 9.9 h/day | |
| Daylight | 12.5 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 Carcassonne 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.
Busyschool holidays in 3 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Carcassonne'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).
Best weatherCarcassonne's best weather comes in May, June and September — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
What's on in Carcassonne in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Canal du Midi boating season
25 Mar – 5 Nov · usuallySummer season opensHire boats work the canal through the town from the end of March to the start of November; the locks come out of service for maintenance over the winter. The towpath walks all year.
Nearby, and something's on
Within 300 km of Carcassonne — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Carcassonne?
Carcassonne in September — FAQ
- Is September a good time to visit Carcassonne?
- September in Carcassonne: warm, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Carcassonne on SeasonMap's comfort score (92/100).
- What is the weather like in Carcassonne in September?
- In September, Carcassonne averages a daily high of 26.5°C and a low of 13.7°C, with about 48.3 mm of rain over roughly 8.9 rainy days.
- What is the air quality in Carcassonne in September?
- Carcassonne has a mean US Air Quality Index of about 35 in September.
Other months in Carcassonne
Compare Carcassonne in September
Warmer or cooler than Carcassonne in September
Similar destinations in Western Europe — September
Within 300 km: Soldeu's Summer lifts and trails around 20 Jun – 15 Sep, and Girona's Emporda grape harvest around 25 Aug – 5 Oct.