Chamonix · AutumnMonth summary
Chamonix weather in September
✅ Good
🌡️ Temperature min / max
50°F – 64°F
🌧 Rainy days
46% of days
☀️ Sunshine
11.0h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
7.0/10
📅 📅 Best month
August (7.9/10)
Quick decision
Should you visit Chamonix in September?
✅ Good
✅ Yes if: you want to explore the city on foot without suffering from heat.
❌ No if: you're looking for a beach destination — water and air are still cool.
Our take: September is a good time to visit Chamonix. August remains slightly better (+0.9 pts).
By trip type
Chamonix in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ⚠️ Possible
- 🏖️ Beach / swimming : — No sea access
- 💰 💰 Budget : 💸 Peak season
Local context
What to expect in September
Autumn in Chamonix is often underrated: 18°F, golden light and declining crowds. An interesting window. With 46% of rainy days, always have indoor alternatives planned. Not the best window, but acceptable if dates are constrained. August (7.9/10) is significantly better if possible.
Browse by month
All months for Chamonix
Annual table
Month-by-month comparison
| Month | Min °F | Max °F | Rain % | Precip in | Sun h/d | Score | Ski score 🎿 |
|---|---|---|---|---|---|---|---|
| 🌨️ January | 25°F | 39°F | 45% | 0.2in | 7.3h | 2.9/10 | 7.5/10 |
| 🌦️ February | 28°F | 45°F | 41% | 0.2in | 9.0h | 4.1/10 | 7.2/10 |
| 🌦️ March | 30°F | 46°F | 45% | 0.2in | 10.4h | 4.2/10 | 7.0/10 |
| 🌦️ April | 36°F | 55°F | 48% | 0.2in | 12.0h | 5.5/10 | 5.5/10 |
| 🌦️ May | 43°F | 61°F | 61% | 0.2in | 12.7h | 6.1/10 | 4.4/10 |
| 🌦️ June | 50°F | 70°F | 57% | 0.2in | 13.6h | 7.3/10 | 4.0/10 |
| 🌤️ July | 55°F | 73°F | 45% | 0.2in | 14.1h | 7.8/10 | 4.1/10 |
| 🌤️ August | 55°F | 75°F | 39% | 0.1in | 13.0h | 7.9/10 | 4.1/10 |
| 🌦️ September | 50°F | 64°F | 46% | 0.2in | 11.0h | 7.0/10 | 4.3/10 |
| ⛅ October | 43°F | 59°F | 37% | 0.2in | 9.7h | 6.4/10 | 4.6/10 |
| 🌦️ November | 32°F | 46°F | 45% | 0.2in | 7.9h | 4.0/10 | 6.5/10 |
| 🌦️ December | 27°F | 43°F | 43% | 0.2in | 7.4h | 3.5/10 | 7.1/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In September, Chamonix averages 64°F, 46% rainy days and 11.0h of sunshine per day. Overall weather score: 7.0/10.
See methodology →
Comparison
September vs August (best month)
The best month is August (score 7.9/10). Difference:
- 🌡️ Max temperature : +6°F
- 🌧 Rainy days : -7%
- ☀️ Sunshine : +2.0h/day
FAQ
FAQ — Chamonix in September
Is September a good time to visit Chamonix?
Yes, September is a good time (7.0/10). Great for outdoor activities and hiking.
What to do in Chamonix in September?
With 64°F max and 11.0h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
Find a place to stay in Chamonix
Find places to stay in Chamonix in September
Search on Hotels.com
Activities & tours
Activities and tours in Chamonix
Guided tours, skip-the-line tickets and local experiences.
Browse activities on GetYourGuide
Flights
Find a flight to Chamonix
Compare flights from all airlines.
Search flights
←
Explore also
Similar destinations in September
Zurich🌍 Top destinations
Other top destinations in September
Puerto Vallarta
Banjul
TrinidadWeather rankings
Compare destinations by weather
Best in EuropeGuides & comparisons