Turku weather in September 2025

Expect 57°F daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Turku in September. Check more long-term weather averages for Turku in September before you book your next holiday to Finland in 2025/2026.

  • 57°F maximum daytime temperature in September in Turku57
    57°F max day temperature
  • 4 hours of sunshine per day
  • 18 days with some rainfall in September in Turku18
    18 days with some rainfall
  • 45°F minimum night-time temperature in September in Turku45
    45°F min night temperature
  • 13 hours of daylight per day in September in Turku13
    13 hours of daylight per day
  • No heat & humidity in September in Turku0
    No heat & humidity
  • 2.6 inches monthly rainfall in September in Turku2.6
    2.6 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Turku3
    3 (Moderate) UV index
  • 55°F sea temperature in September in Turku55
    55°F sea temperature

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The September weather guide for Finland (Turku) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How warm is it in Turku in September?

Daytime temperatures usually reach 57°F in Turku in September, falling to 45°F at night.

How sunny is it in Turku in September?

There are normally 4 hours of bright sunshine each day in Turku in September - that's 34% of daylight hours.

How warm is the sea around Turku in September?

The average sea temperature around Turku in September is 55°F.

Does it rain in Turku in September?

There are usually 18 days with some rain in Turku in September and the average monthly rainfall is 2.6 inches.

Turku September sunrise & sunset times

Browse the sunrise and sunset times for Turku in September 2025. Select a month to view Turku sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:25 19:35
Monday, 15th September 2025 05:59 18:52
Tuesday, 30th September 2025 06:35 18:06

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