The temperatures in Thurgau 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 Thurgau 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 Thurgau in September 2026.
If you’re planning to visit Thurgau in the near future, we highly recommend that you review the 14 day weather forecast for Thurgau before you arrive.
Temperatures
21° / 9°
Rainy Days
4
Snowy Days
0
Dry Days
26
Rainfall
79
mm
Sun Hours
10.3
Hrs
