The temperatures in Kotka in September are usually low and can range between 12°C and 15°C.
You can expect about 3 to 8 days of rain in Kotka 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 Kotka in September 2025.
If you’re planning to visit Kotka in the near future, we highly recommend that you review the 14 day weather forecast for Kotka before you arrive.
Temperatures
15° / 12°
Rainy Days
7
Snowy Days
0
Dry Days
23
Rainfall
121
mm
Sun Hours
8.9
Hrs
