The temperatures in Tallinn in September are usually low and can range between 10°C and 16°C.
You can expect about 3 to 8 days of rain in Tallinn 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 Tallinn in September 2025.
If you’re planning to visit Tallinn in the near future, we highly recommend that you review the 14 day weather forecast for Tallinn before you arrive.
Temperatures
16° / 10°
Rainy Days
7
Snowy Days
0
Dry Days
23
Rainfall
106
mm
Sun Hours
8.8
Hrs
