The temperatures in Annecy in September are quite cold with temperatures between 48°F and 73°F, warm clothes are a must.
You can expect about 3 to 8 days of rain in Annecy during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Annecy in September 2025.
If you’re planning to visit Annecy in the near future, we highly recommend that you review the 14 day weather forecast for Annecy before you arrive.
Temperatures
73° / 48°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
3.94
in
Sun Hours
11.1
Hrs
