The temperatures in Switzerland in September are quite cold with temperatures between 9°C and 21°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Switzerland 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 Switzerland in September 2025.
If you’re planning to visit Switzerland in the near future, we highly recommend that you review the 14 day weather forecast for Switzerland before you arrive.
Temperatures
21° / 9°
Rainy Days
3
Snowy Days
0
Dry Days
27
Rainfall
67
mm
Sun Hours
10.7
Hrs
