Month guide · Helsinki · Finland
Helsinki in September
What September is really like in Helsinki: weather, crowds, prices, events and what to pack.
Updated By the AMZBooking editorial team
Photo: kallerna, CC BY-SA 4.0
Quick answer
September is one of the best months to visit Helsinki. Expect average highs of 16°C (61°F), lows of 9°C (48°F), about 9 rainy days and roughly 12.7 hours of daylight. Crisp, often sunny days and autumn colour (ruska) in parks and Nuuksio; good hiking weather.
Key facts
- Average high / low
- 16°C (61°F) / 9°C (48°F)
- Rainy days
- About 9
- Daylight
- About 12.7 hours
- Sea temperature
- 14°C (57°F)
- Crowds
- Moderate
- Hotel prices
- Average
Weather in September
September is the 4th-warmest month in Helsinki: days average 16°C (61°F) against a yearly average high of 10°C (50°F), and nights fall to about 9°C (48°F). Rain falls on roughly 9 of its 30 days. Compared with August (21°C (70°F)), September is cooler; by October highs drop to around 9°C (48°F).
- Sunrise (15 September)
- About 06:48
- Sunset (15 September)
- About 19:43
- Daylight
- About 12.7 hours
- Sea
- 14°C (57°F)
Autumn (September–November). Crisp September colour and the herring market, then darkening, rainy weeks into November; low prices.
Crowds and prices
On a 1–5 scale, September rates 3 for crowds (the peak is July at 5) and 3 for hotel prices (highest in June). Prices sit in the middle of the year's range.
Events in September
- Helsinki Design Week (usually September)
Dates move from year to year. Check the organiser’s site before booking travel around an event.
What to do in September
Mild, settled days suit walking, viewpoints and time outdoors.
Park · Kaartinkaupunki
Esplanadi park
Buy a coffee and pastry and join the locals on the lawns on a sunny afternoon.
- Time needed
- 45 minutes
- Cost
- Free
- Free
- Outdoors
- Shopping
- Couples
Landmark · Töölö
Sibelius Monument
Eila Hiltunen's 1967 monument to the composer Jean Sibelius is a wave of more than 600 welded steel pipes, set on a rock in Sibelius Park beside a steel mask of his face.
- Time needed
- 30 minutes
- Cost
- Free
- Free
- Art
- Iconic
- Outdoors
Museum · Seurasaari
Seurasaari Open-Air Museum
Bring nuts for the squirrels and walk the coastal path around the island.
- Time needed
- 2–3 hours
- Cost
- Low cost
- History
- Outdoors
- Kids
- Nature
Experience · Kruununhaka
Allas Sea Pool
Floating at the quay between Market Square and Katajanokka, Allas has a heated pool, an unheated seawater pool and saunas, all looking straight at the Cathedral, the harbour and the Suomenlinna ferries.
- Time needed
- 1.5–2 hours
- Cost
- Mid-priced
- Active
- Views
- Couples
- Iconic
What to pack
For highs near 16°C, lows near 9°C and 9 wet days: layers, a warm sweater and a jacket for cool evenings; a packable rain jacket for showers; comfortable walking shoes.
Is September a good time to visit Helsinki?
One of the best months to visit Helsinki, with a notable event on the calendar. The other best months are May–August. Compare every month.
Helsinki in other months
Questions travellers ask
+Is September a good time to visit Helsinki?
It is one of the best months to visit Helsinki. Crisp, often sunny days and autumn colour (ruska) in parks and Nuuksio; good hiking weather.
+How warm is Helsinki in September?
Average highs are around 16°C (61°F) and lows around 9°C (48°F).
+Does it rain a lot in Helsinki in September?
Expect rain on about 9 days of the month.