Helsinki Weather in September
Finland · 30-year monthly averages
👍 Good time to visit
September in Helsinki is mild, with average daytime highs around 15°C (60°F) and nighttime lows near 9°C (49°F). Expect roughly 56mm of precipitation spread over about 9 rainy days, with little rainfall.
Avg high
15°C
60°F
Avg low
9°C
49°F
Rainfall
56mm
dry
Rainy days
9
days with ≥1mm
🎒 What to pack
- light jacket
- layers for cool evenings
September vs the rest of the year
FAQ
- How hot is Helsinki in September?
- September in Helsinki is mild, with average daytime highs around 15°C (60°F) and nighttime lows near 9°C (49°F). Expect roughly 56mm of precipitation spread over about 9 rainy days, with little rainfall.
- Does it rain a lot in Helsinki in September?
- Helsinki sees around 56mm of precipitation in September on average — dry by global standards.
- Is September a good time to visit Helsinki?
- September is a good month to visit Helsinki, with generally agreeable conditions.