The temperatures in Kouvola in September are quite cold with temperatures between 8°C and 15°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Kouvola 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 Kouvola in September 2026.
If you’re planning to visit Kouvola in the near future, we highly recommend that you review the 14 day weather forecast for Kouvola before you arrive.
Temperatures
15° / 8°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
77
mm
Sun Hours
8.2
Hrs
