Været i Finland i september
Klimanormaler for hele Finland over 15 byer.
How Hot Is Finland in september?
Finland's small geographic footprint means September is uniformly mild — typical 14°C highs nationwide.
Sunshine in Finland in september
Dark, overcast days dominate Finland in September — Helsinki sees just 2.8h of sun a day, and the pattern is similar across most regions. Cloud cover is heavy and persistent, with even the brighter regions struggling to escape the gloom for long.
Does It Rain In Finland In september?
Finland sees moderate rainfall in September — Helsinki averages 71mm across 12 days, with notable regional variation. Coastal cities often see more rain than the inland average, while drier regions see less. The country's September weather mixes sunny stretches with regular shower spells.
Is Finland Humid In september?
Heavy oppressive humidity covers Finland in September: 80% on average in Helsinki, and similar saturating conditions exist nationwide. The air feels thick and heavy from sunrise to sundown, with little overnight respite. Coastal and tropical regions feel especially stifling.
Wind In Finland In september
Gentle steady winds define Finland's September: Helsinki averages 17 kph, with conditions consistent across most regions. The breeze keeps warm days bearable without being a nuisance.
Cloud Cover In Finland In september
Cloudy skies dominate Finland in September — 69% cover in Helsinki, with similar overcast conditions in most regions. Direct sun is patchy and broken; expect grey stretches between brief bright moments. Coastal areas may be heavier than inland.