What is the weather like in Chamonix vs Val d'Isère in September?

In September, Chamonix averages 19°C high / 10°C low with about 130 mm of rain; Val d'Isère averages 15°C high / 7°C low with about 110 mm.

Chamonix vs Val d'Isère in September

Val d'Isère is the better pick in September — 27 vs 21 on SeasonMap's comfort score. Val d'Isère is cool, rainy, clean air, while Chamonix is nice, rainy, clean air.

Chamonix vs Val d'Isère — September climate, side by side

	Chamonix	Val d'Isère
Comfort score	21/100 (F)	27/100 (F)
Feels-like high	19°C	14°C
Avg high / low	19° / 10°	15° / 7°
Rainfall	130 mm	110 mm
Rainy days	16	17
Humidity	82%	80%
Air quality (AQI)	37	38

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Chamonix vs Val d'Isère in September — FAQ

Is September better in Chamonix or Val d'Isère?: Val d'Isère is the better pick in September — 27 vs 21 on SeasonMap's comfort score. Val d'Isère is cool, rainy, clean air, while Chamonix is nice, rainy, clean air.
What is the weather like in Chamonix vs Val d'Isère in September?: In September, Chamonix averages 19°C high / 10°C low with about 130 mm of rain; Val d'Isère averages 15°C high / 7°C low with about 110 mm.