The weather in Jonndalen in September is very cold with temperatures between -1°C and 12°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Jonndalen 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 Jonndalen in September 2026.
If you’re planning to visit Jonndalen in the near future, we highly recommend that you review the 14 day weather forecast for Jonndalen before you arrive.
Temperatures
12° / -1°
Rainy Days
6
Snowy Days
0
Dry Days
23
Rainfall
82
mm
Sun Hours
8.9
Hrs
