The temperatures in Sundsvall in September are quite cold with temperatures between 7°C and 14°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Sundsvall 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 Sundsvall in September 2026.
If you’re planning to visit Sundsvall in the near future, we highly recommend that you review the 14 day weather forecast for Sundsvall before you arrive.
Temperatures
14° / 7°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
72
mm
Sun Hours
8.7
Hrs
