The weather in St. Moritz in September is very cold with temperatures between 0°C and 13°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in St. Moritz. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Please note that St. Moritz can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in St. Moritz in September 2026.
If you’re planning to visit St. Moritz in the near future, we highly recommend that you review the 14 day weather forecast for St. Moritz before you arrive.
Temperatures
13° / 0°
Rainy Days
12
Snowy Days
2
Dry Days
16
Rainfall
123
mm
Sun Hours
9.8
Hrs
