The temperatures in Trysil in September are quite cold with temperatures between 5°C and 12°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Trysil. 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 Trysil can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Trysil in September 2026.
If you’re planning to visit Trysil in the near future, we highly recommend that you review the 14 day weather forecast for Trysil before you arrive.
Temperatures
12° / 5°
Rainy Days
9
Snowy Days
1
Dry Days
20
Rainfall
124
mm
Sun Hours
7.9
Hrs
