Helsinki weather in September
Monthly temperatures, rain, humidity, what to wear and what to pack — 2024–2025 historical average
Helsinki September weather at a glance
In September, Helsinki averages 14.7°C, with typical highs of 17.2°C and lows of 12.1°C. The historical average is 12 wet days and 83% humidity.
Helsinki September temperature & humidity
Helsinki September rain & wet days
Pack a compact umbrella. Keep an indoor stop available between outdoor activities.
What to wear in Helsinki in September
Wear long sleeves with a light jacket or cardigan that is easy to remove during the day. Showers are possible, so a compact umbrella is useful.
- DaytimeLong sleeves and a light jacket · average high 17.2°C
- Morning & eveningLong sleeves with a jacket or cardigan · average low 12.1°C
- FootwearComfortable walking shoes; quick-dry footwear for rainy days.
Packing essentials
Coupang affiliate links · We earn a commission on purchases. Products are sold on the Korean Coupang store.
Helsinki September sunrise & sunset times
2026 September · Local time (Europe/Helsinki)
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 2026-09-01 | 06:14 | 20:25 | 14h 10m |
| 2026-09-15 | 06:48 | 19:42 | 12h 54m |
| 2026-09-30 | 07:23 | 18:56 | 11h 33m |
For sunset photos, arrive before the listed sunset time. Clouds, mountains and buildings can change when the sun becomes visible or disappears.
Calculated for the city coordinates with daylight saving applied. SunCalc · tz-lookup
Helsinki travel updates
Watch live CCTV
- Helsinki South HarbourPort of Helsinki · Camera directory
Check the camera timestamp at the source.
Today’s weather and forecast
Check temperature, rain and wind in Windy.
Forecast · Windy. Monthly averages are in the Temperature section.
Helsinki news search
Search for recent news and check publication dates before you travel.
Helsinki city map
This map shows the city area, not a specific meeting point.
Helsinki travel essentials
Popular MyRealTrip products · city search, sorted by sales · Product names are in Korean.
- Travel SIM card
[유럽 유심] Three Mobile 30일 총 6~30GB 통화 무제한 공항수령Book now ↗ - Travel SIM card
[유럽 유심]Three Mobile 30일 6GB~30GB 택배/ 홍대매장 방문수령 가능Book now ↗ - [공항수령/전국배송] 고프로13대여 인천공항 당일수령, 국내배송Book now ↗
- Travel tour
[한국어] 핀란드 현지 한국인이 들려주는 찐 핀란드! 하루만에 둘러보는 헬싱키 시내투어!Book now ↗ - [공항수령/전국배송] 고프로11대여 인천공항 당일수령, 국내배송Book now ↗
Explore with Klook
Klook.comAffiliate widget · We may earn a commission on bookings.
Helsinki hotel search · Trip.com
Search hotels by destination, dates and number of guests. The Trip.com widget is in Korean.
Affiliate widget · A qualifying booking may earn us a commission. Trip.com may use cookies in this search widget.
Best months to visit Helsinki
Bar height shows our simple weather-comfort score, not a safety rating; colour shows temperature.
September weather by year
Daily weather in 2025
Daily high and low temperatures; blue labels show precipitation
Frequently asked questions
What is Helsinki weather like in September?
In September, Helsinki averages 14.7°C, with typical highs of 17.2°C and lows of 12.1°C. The historical average is 12 wet days and 83% humidity. Our weather-comfort rating for this month is fair.
Does it rain a lot in Helsinki in September?
There are about 12 wet days in September. A compact umbrella is still useful.
What should I wear in Helsinki in September?
Wear long sleeves with a light jacket or cardigan that is easy to remove during the day. Showers are possible, so a compact umbrella is useful.
What are the best months to visit Helsinki?
Recent weather data rates May among the more comfortable months.
Where can I check Helsinki weather in September in real time?
Check local webcams for the view right now and a local weather service for today’s forecast. Monthly temperatures here are historical averages.
What time are sunrise and sunset in Helsinki in September?
On 2026-09-15, calculated sunrise is 06:48 and sunset is 19:42 in local time (Europe/Helsinki). Times vary by date and terrain.
Helsinki weather by month
More Europe destinations in September
Open-Meteo (CC BY 4.0) · 2024–2025 historical data, aggregated and rounded by this site. Not a forecast or long-term climate normal. Calculation method and limitations