Is Helsinki hot in October?
Days are typically cold at 9.1°C, while nights average 4.2°C.
Finland · 1991–2020 normal
Helsinki in
October.
Typical October weather in Helsinki: 9.1°C by day, 4.2°C at night, 73 mm of rain over 10.2 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high9.1°C
Typical low4.2°C
Rain73 mm
Wet days10.2
In the year-round weather comparison, October scores 20 out of 100 (July leads the year at 85). Daylight is calculated as 9 h 58 from latitude 60.17°. Open-water sea temperature is 10.3°C (6 km from the place centre).
October at a glance
What is Helsinki like in October?
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 73 mm across about 10 wet days.
How much daylight is there?
There are about 9 h 58 between sunrise and sunset at mid-month, calculated from the place latitude.
Is October a good time to visit?
October ranks 6 of 12 in our weather comparison; July ranks first.
Event window
Long northern nights in October
At 60.2° the calculated mid-month daylight is 9 h 58. That darkness, not an aurora observation, is why this latitude is sought for northern or southern lights in October. Typical nights are 4.2°C.
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.
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