The temperatures in Skien in September are usually low and can range between 11°C and 16°C.
You can expect about 3 to 8 days of rain in Skien 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 Skien in September 2026.
If you’re planning to visit Skien in the near future, we highly recommend that you review the 14 day weather forecast for Skien before you arrive.
Temperatures
16° / 11°
Rainy Days
6
Snowy Days
0
Dry Days
24
Rainfall
136
mm
Sun Hours
9.4
Hrs
