Finland in September
September is one of Finland's weaker months (rank 10 of 12): its 4 destinations average 51/100, led by Helsinki at 77 — 15°C and 9 rainy days — while Ruka is cooler at 8°C and scores 28.
#10 of 12 months for Finland · 4 destinations · updated September 2026 · climate normals from ERA5 reanalysis
🇫🇮 Finland, month by month
51/100 in SeptemberWhere in Finland in September
Comfort is SeasonMap's 0–100 score; each place is judged through the lens that suits it — beaches on beach weather, ski resorts on snow. "At its best" means September is one of that place's own top three months. Feels-like highs fold in humidity, wind and sun.
What's on in Finland in September
- Berry and crayfish season · Helsinki · 20 Jul – 10 Sep (usually)
- Helsinki Festival · Helsinki · 18 Aug – 5 Sep
- Ruska, the autumn colour · Helsinki · 5 Sep – 10 Oct (usually)
- Aurora season · Rovaniemi and 2 more places · 25 Aug – 10 Apr (usually)
- Ruska · Rovaniemi and 1 more place · 5–30 Sep (usually)
- Ruska on the fells · Levi · 5–30 Sep (usually)