Turku weather in September 2025

Expect daytime maximum temperatures of 14°C in Turku, Finland in September based on long-term weather averages. There are 4 hours of sunshine per day on average with 18 days with some rainfall and typically 66 mm of rainfall in the month.

  • 14°C maximum daytime temperature in September in Turku14
    14°C max day temperature
  • 4 hours of sunshine per day
  • 18 days with some rainfall in September in Turku18
    18 days with some rainfall
  • 7°C minimum night-time temperature in September in Turku7
    7°C 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
  • 66 mm monthly rainfall in September in Turku66
    66 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Turku3
    3 (Moderate) UV index
  • 13°C sea temperature in September in Turku13
    13°C 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 / mm)  |  Imperial (°F / inches)

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How warm is it in Turku in September?

Daytime temperatures usually reach 14°C in Turku in September, falling to 7°C 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 13°C.

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 66mm.

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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