Finland
Helsinki in September
🍂 AutumnCool and some showers.
🎒 Pack: warm jacket for evenings
Why September scores 9.2What goes into the score
How it works- Weather comfort8.7
- !Cool (15°C highs / 9°C lows)
- ✓Comfortable humidity (dew point 10°C)
- ✓Mostly dry (~56 mm rain)
- Air quality9.8
- ✓Good (within WHO guideline) (PM2.5 ~7 µg/m³)
- Seasonal hazards10.0
- ·No notable seasonal hazards
- Safety baseline9.0
- ·Normal precautions
| Sep | Jul | |
|---|---|---|
| Score | 9.2 Excellent | 9.7 Excellent |
| Season | 🍂 Autumn | ☀️ Summer |
| High / low | 15° / 9° | 22° / 15° |
| Rain | 56 mm | 57 mm |
| Humidity | dew pt 10° | dew pt 14° |
| PM2.5 | 7 µg/m³ | 5 µg/m³ |
Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: Helsinki weather-station normals. Rainfall: Central Helsinki weather-station normals (national met service).
Holidays & crowdsSeptember 2027
No long holidaysNo long public-holiday weekends this month. School holidays aren't counted, so check those if you want to avoid family crowds.
No national public holidays in Finland this month.
National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).
Explore HelsinkiEvents, sights, food & souvenirs
Check event dates locallyFinland's seaside capital, known for design, saunas, island fortresses, Art Nouveau architecture and long summer daylight.
Helsinki FestivalDate variesUsually late August to early September
Finland's largest arts festival, with music, theatre, dance and the Night of the Arts.
Why go: Many events are free.
Where: Venues across the city
Coming up later
Baltic Herring MarketDate variesUsually early October
A centuries-old fair where fishermen sell herring in many preparations from their boats.
Why go: A good chance to try pickled herring and dark rye bread.
Where: Market Square
Independence DayEvery year6 December every year
A solemn national holiday with candles in windows and a torchlight student procession.
Why go: Many shops and services close.
Where: Nationwide
Vappu (May Day)Every year30 April to 1 May every year
Students and residents celebrate spring with the capping of the Havis Amanda statue and big picnics.
Why go: Expect large, festive crowds and white student caps everywhere.
Where: Market Square, Kaivopuisto Park and citywide
Suomenlinna
A UNESCO-listed sea fortress spread over islands, reached by public ferry from Market Square.
Senate Square and Helsinki Cathedral
A neoclassical square dominated by the white Lutheran cathedral.
Uspenski Cathedral
A red-brick Orthodox cathedral on a hill overlooking the harbour.
Temppeliaukio Church
A church carved into solid rock, topped with a copper dome.
Oodi Central Library
A striking public library with workshops, a cinema and a rooftop terrace.
Public saunas
Modern and traditional saunas, some with sea swimming, such as Löyly and Allas Sea Pool.
💡 Bring swimwear for mixed saunas.
Karelian pies (karjalanpiirakka)
Thin rye pastry filled with rice porridge, topped with egg butter.
💡 Market halls and bakeries
Salmon soup (lohikeitto)
A creamy soup of salmon, potatoes and dill.
💡 Old Market Hall
Korvapuusti
Finnish cinnamon bun flavoured with cardamom.
Sautéed reindeer (poronkäristys)
Thinly sliced reindeer with mashed potato and lingonberries.
Salmiakki
Strong salty liquorice, a Finnish favourite.
Marimekko textiles
Bold printed fabrics and bags from the long-established Finnish design house.
Iittala glassware
Finnish design glass and tableware, including Alvar Aalto designs.
Fazer chocolate
Finland's classic milk chocolate in its blue wrapper.
Moomin items
Mugs and gifts featuring Tove Jansson's Moomin characters.