Helsinki weather
Ten-year climate averages, month by month
Helsinki in september
Current month averages, based on ten years of records. Read the full guide →
Helsinki is the capital of Finland on the shore of the Gulf of Finland. Christmas markets, sauna culture and short winter days combine into a quintessentially Nordic winter city.
The year in weather
Helsinki weather by month
Pick a month for the full climate guide — temperature, rainfall, sunshine, packing tips and hotel deals for Helsinki.
Places that feel like Helsinki in september
Helsinki weather — FAQ
Q01Which months are best for visiting Helsinki?
Which months are best for visiting Helsinki?
The best months to visit Helsinki are June, July, August, September. June-July gives 19-hour daylight for Suomenlinna picnics and Kallio terrace culture; Juhannus midsummer weekend everything shuts as locals flee to summer cottages.
Q02Which month is warmest in Helsinki?
Which month is warmest in Helsinki?
July runs the highest averages in Helsinki, with typical daytime highs of 21°C (69°F). 25C heatwave triggers 'hellepaiva' warnings; Finns strip to underwear in Kaivopuisto park, Loyly sauna's sea plunge queues 90 minutes.
Q03Which month is chilliest in Helsinki?
Which month is chilliest in Helsinki?
January brings the lowest averages, with daytime highs near -1°C (30°F). January -15C freezes the harbor; Market Square salmon smokers work outdoors, tram windows fog, and 3:30pm sunset drives Kamppi mall traffic.
Q04When is the rainy season in Helsinki?
When is the rainy season in Helsinki?
August typically records the highest monthly rainfall — around 83mm on average. October brings 'kaamos' pre-dark rains; cyclists still commute in full waterproofs and cafes stock reflectors as a welcome gift for tourists.
Q05How would you describe Helsinki's weather?
How would you describe Helsinki's weather?
Helsinki, Finland has mild summers, freezing winters. Finns respect personal space to comic extremes; standing 2m apart at bus stops is normal. Sauna etiquette: naked, silent, no phones, throw water sparingly. Salmiakki black licorice is a national obsession and hits tourists like cough syrup. Alko state liquor stores close by 9pm and never on Sundays. Karaoke bars in Kallio are unironically serious; locals sing Finnish tango. You can read the detailed month-by-month breakdown on this page.