SeasonMapMontreux weather in September
Switzerland
September in Montreux: nice, rainy, with clean air — an excellent time to visit.
#3 of 12 months in Montreux · #529 of 1383 destinations to visit in September · comfort 84/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Montreux in September
Other months in Montreux
Montreux's forum calls June genuinely variable, sometimes warm enough to swim in Lake Geneva, other times cool enough to need a raincoat with a liner. Regulars' standard advice is to check the forecast the week before rather than assume, pack layers including a sweater or vest, and remember sun can still burn on a walk even when the air feels cool.
Add your own note from Montreux's card on the map.
Montreux climate normals — September
| Daytime high | 20°C / 68°F | 😎 nice |
|---|---|---|
| Nighttime low | 14°C / 57°F | |
| Feels like (high) | 21°C / 70°F | |
| Rainfall | 127 mm / 5 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 12°C / 54°F | |
| Sunshine | 9.1 h/day | |
| Daylight | 12.5 h | |
| Wind | 8 km/h / 5 mph | |
| Snowfall | 0.8 cm / 0.3 in | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Montreux 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 Montreux'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 weatherMontreux's best weather comes in June, August and September — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
What's on in Montreux in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Lake swimming season
20 Jun – 15 Sep · usuallySea warm enoughThe Vaud shore swims from late June, and the water holds into September after the festival crowd has gone. The lidos between Montreux and Vevey are where the town actually goes.
- Season
Rochers-de-Naye walking season
20 Jun – 15 Oct · usuallyTrail seasonThe cog railway climbs to 2,000 metres in under an hour and the ridge walking runs from late June to mid-October. Below it, the Lavaux terraces are walkable most of the year.
- Season
Lavaux grape harvest
15 Sep – 15 Oct · usuallyThe terraced vineyards between here and Lausanne are picked from the middle of September, and the cellars along the walking path open as you go. Chasselas, and a lot of it.
Nearby, and something's on
Within 300 km of Montreux — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Montreux?
Montreux in September — FAQ
- Is September a good time to visit Montreux?
- September in Montreux: nice, rainy, with clean air — an excellent time to visit. It ranks #3 of 12 months for Montreux on SeasonMap's comfort score (84/100).
- What is the weather like in Montreux in September?
- In September, Montreux averages a daily high of 20.1°C and a low of 13.7°C, with about 127 mm of rain over roughly 14 rainy days.
- What is the air quality in Montreux in September?
- Montreux has a mean US Air Quality Index of about 38 in September.
Other months in Montreux
Warmer or cooler than Montreux in September
Similar destinations in Central Europe — September
Within 300 km: Gstaad's Walking season and alpine dairies around 15 Jun – 10 Oct, and Chamonix's High mountain huts open around 15 Jun – 20 Sep.