Weather in Finland in September
September in Finland is cool outdoor weather: usable if you dress for it, not a beach brief.
A country pin in September is a warning: one region of Finland will not match another. Use a city page if you already know where you are going. Compared with July and January, September sits in the middle of Finland's year.
- Average temp
- 10°C
5–14°C
- Rainfall
- 57 mm
Showers likely
- Sunshine
- 4.3 h
hours per day
What to expect
Daytime
Cool days in Finland: a jumper you can take off, a shell in the bag. Walking is fine. Lingering outside without a layer is optimism.
Mornings and evenings are colder than the postcard. Pack for both, especially if you leave the built-up centre.
Rain
Mixed skies in Finland in September. Dry days and wet days share the month. Outdoor plans need a backup, not a cancellation policy.
Pack a shell you will actually carry. The monthly table is the place for totals. This is the feel: usable, interrupted.
Evening
Evenings are cooler. A layer helps after sunset.
What to pack
Rain jacket
A layer for cooler evenings
Where to stay in Finland
Featured stays on trip1. Dates are a starting point for September.
Travel guides for Finland
What to read before you book.
Average weather in Finland
TemperatureRainfall
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FAQs about Finland
Climate averages for Finland, 1991–2020.
The best time to visit Finland is between May and October, the most comfortable stretch of the year on these averages.
July is the hottest month, with an average around 17°C.
July is the wettest month, with about 78 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
