The temperatures in Helsinki in August are comfortable with low of 15°C and and high up to 19°C.
You can expect about 3 to 8 days of rain in Helsinki during the month of August. 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 Helsinki in August 2025.
If you’re planning to visit Helsinki in the near future, we highly recommend that you review the 14 day weather forecast for Helsinki before you arrive.
Temperatures
19° / 15°
Rainy Days
7
Snowy Days
0
Dry Days
24
Rainfall
135
mm
Sun Hours
10.1
Hrs
