September · France
Best time to visit Chamonix in September Weather, crowds & prices
Weather in Chamonix in September
Average temperature 14°C, 161 mm of rain, about 24 days with 6+ hours of sunshine and 76% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
1.7/10
Ranked #11 of 12 months
- Avg temp
- 14°C
- Rainfall
- 161 mm
- Humidity
- 76%
- Days with 6h+ sun
- 24
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Chamonix scores 1.7/10 for snow and ski travel - ranked #11 of 12. Expect around 14°C, 161 mm of rain, and roughly 24 days with 6+ hours of sunshine this month.
Alpine ski slopes and glacial panoramas reach their peak in the crisp, snow-laden heart of January.
September in Chamonix: expect compromises
Temperatures hover around 14°C (56°F) — the kind of month where neither heat nor cold forces the schedule.
161 mm of rain makes this a wet month here, though with about 24 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 1.7/10 on the same scale — 11th of 12 months, versus 8.3/10 for the best month here.
Pack layers you can shed by midday plus one warm layer for the evening, a waterproof shell rather than an umbrella.
Budget for low-season pricing, and crowds are light for this destination.
If your dates are flexible, January is materially better in Chamonix — 6.6 points higher on the same scale.
Frequently asked
- What is the weather like in Chamonix in September?
- In September, Chamonix averages 14°C, 161 mm of rain, and about 24 days with 6+ hours of sunshine. Its climate-comfort score is 1.7/10.
- Is September a good time to visit Chamonix?
- September earns a 1.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Chamonix in September?
- Expect about 161 mm of rain in September. Average humidity is 76% and there are about 24 days with 6+ hours of sunshine.
Curated in Chamonix
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Chamonix, France. Live activities and tours from GetYourGuide, matched to this destination.