Chamonix weather in September 2025

Expect 8°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Chamonix in September. Check more long-term weather averages for Chamonix in September before you book your next holiday to France in 2025/2026.

8
8°C max day temperature
6
6 hours of sunshine per day
13
13 days with some rainfall
2
2°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
129
129 mm of monthly rainfall
5
5 (Moderate) UV index

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Destination

The September weather guide for France (Chamonix) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

More about France

How warm is it in Chamonix in September?

Daytime temperatures usually reach 8°C in Chamonix in September, falling to 2°C at night.

How sunny is it in Chamonix in September?

There are normally 6 hours of bright sunshine each day in Chamonix in September - that's 47% of daylight hours.

Does it rain in Chamonix in September?

There are usually 13 days with some rain in Chamonix in September and the average monthly rainfall is 129mm.

Chamonix September sunrise & sunset times

Browse the sunrise and sunset times for Chamonix in September 2025. Select a month to view Chamonix sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Monday, 1st September 2025	05:53	19:11
Monday, 15th September 2025	06:11	18:44
Tuesday, 30th September 2025	06:30	18:14

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France - quick facts
Flight time^✝	1.5 to 2.5 hours
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