September · typical climate, not a forecast
Chamonix in September
France
Workable
19°C day · 9°C night · 44% rain · 12h daylight · moderate crowds · €1,325 estimated
Live · Chamonix
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Live · Tallinn (you)
–°C
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Cool Score breakdown
Scored for 5 nights from Tallinn in September.
- Temperature fit92
18.8°C typical high vs your 12–20°C window
w 26 - Heat escape0
2.5°C warmer than Tallinn
w 14 - Rain probability62
44% chance of rain on an average day
w 11 - Daylight hours59
12.3h of daylight mid-month
w 8 - Outdoor conditions76
Comfortable for a full day outside at 18.8°C
w 10 - Crowding46
Moderate crowds for this month
w 8 - Flight + stay cost49
≈€1325 estimated for 5 nights vs €1000 budget
w 12 - Nature access100
10/10 — wild ground within reach
w 6 - City atmosphere62
5/10 urban texture · 8/10 food scene
w 4
Why Chamonix in September
Altitude is the fastest air conditioning in Europe.
- Aiguille du Midi
- Glacier viewpoints
- High alpine trails
What September in Chamonix is actually like
In September, Chamonix sits around 19°C by day and drops to about 9°C after dark, so a light layer earns its place in the bag even in high summer. That is roughly 2°C warmer than Tallinn at the same time of year — the difference between planning your day around the shade and simply walking out of the door.
Expect rain on roughly 44% of days, usually passing rather than persistent, and about 12 hours of daylight to spend outside. Crowds are moderate crowds this month, and a 5-night trip from Tallinn works out at around €1,325 including flights, a mid-range stay and everyday spending.
Altitude is the fastest air conditioning in Europe. Days here tend to fill up with aiguille du midi, glacier viewpoints, high alpine trails — which is why Chamonix scores 62 out of 100 for september: workable.
Other months
Compare the typical climate month by month.