The temperatures in Western Finland in September are usually low and can range between 10°C and 15°C.
You can expect about 3 to 8 days of rain in Western Finland 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 Western Finland in September 2025.
If you’re planning to visit Western Finland in the near future, we highly recommend that you review the 14 day weather forecast for Western Finland before you arrive.
Temperatures
15° / 10°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
76
mm
Sun Hours
9.3
Hrs
