Is Helsinki hot in August?
Days are typically mild at 20.5°C, while nights average 13.5°C.
Finland · 1991–2020 normal
Helsinki in
August.
Typical August weather in Helsinki: 20.5°C by day, 13.5°C at night, 81 mm of rain over 9.7 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high20.5°C
Typical low13.5°C
Rain81 mm
Wet days9.7
In the year-round weather comparison, August scores 73 out of 100 (July leads the year at 85). Daylight is calculated as 15 h 39 from latitude 60.17°. Open-water sea temperature is 17.2°C (6 km from the place centre).
August at a glance
What is Helsinki like in August?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 81 mm across about 10 wet days.
How much daylight is there?
There are about 15 h 39 between sunrise and sunset at mid-month, calculated from the place latitude.
Is August a good time to visit?
August ranks 2 of 12 in our weather comparison; July ranks first.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 658225
- NOAA station
- FI000000304 · HELSINKI KAISANIEMI AWS
- Station distance
- 0.9 km from the place centre
- Coverage
- Strong coverage · 30 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Helsinki is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
How travel partnerships will work