Weather in Helsinki in August
August in Helsinki is mild enough that walking is the default. This is a city-break month more than a sea-holiday month.
In Finland, this is how Helsinki actually wears August, not how a country centroid would. Compared with July and February, August sits in the middle of Helsinki's year.
- Average temp
- 17°C
13–21°C
- Rainfall
- 84 mm
Showers likely
- Sunshine
- 7.6 h
hours per day
What to expect
Daytime
Mild afternoons in Helsinki are the prize in August. You can eat outside on the good days. You still want something for the breeze.
This is walking weather. Shade is useful, not essential the way it is in the hot months. A long outdoor day is a reasonable plan.
Rain
August is the wet side of the year in Helsinki, the wettest stretch on these averages. Days can be heavy. Plans that cannot survive rain are the wrong plans.
This is not a reason to skip Helsinki if you like the place. It is a reason to pack for weather and to stop treating every grey hour as a failed holiday.
Evening
Evenings are cooler. A layer helps after sunset.
What to pack
Sun protection
Rain jacket
A layer for cooler evenings
Where to stay in Helsinki
Dates are a starting point for August.
Travel guides for Helsinki
What to read before you book.
Average weather in Helsinki
TemperatureRainfall
Similar weather in August
Other destinations whose August averages sit close to this one.
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FAQs about Helsinki
Climate averages for Helsinki, 1991–2020.
The best time to visit Helsinki is between May and October, the most comfortable stretch of the year on these averages.
July is the hottest month, with an average around 18°C.
August is the wettest month, with about 84 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
