The weather in Tromso in September is very cold with temperatures between 4°C and 9°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Tromso. 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 Tromso can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Tromso in September 2025.
If you’re planning to visit Tromso in the near future, we highly recommend that you review the 14 day weather forecast for Tromso before you arrive.
Temperatures
9° / 4°
Rainy Days
12
Snowy Days
1
Dry Days
17
Rainfall
185
mm
Sun Hours
6.4
Hrs
