The weather in Wengen in September is very cold with temperatures between 2°C and 14°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Wengen. 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 Wengen can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Wengen in September 2026.
If you’re planning to visit Wengen in the near future, we highly recommend that you review the 14 day weather forecast for Wengen before you arrive.
Temperatures
14° / 2°
Rainy Days
11
Snowy Days
1
Dry Days
17
Rainfall
140
mm
Sun Hours
9.8
Hrs
