The temperatures in Flam in September are quite cold with temperatures between 5°C and 14°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Flam. 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.
Our weather forecast can give you a great sense of what weather to expect in Flam in September 2025.
If you’re planning to visit Flam in the near future, we highly recommend that you review the 14 day weather forecast for Flam before you arrive.
Temperatures
14° / 5°
Rainy Days
8
Snowy Days
0
Dry Days
22
Rainfall
154
mm
Sun Hours
8.3
Hrs
