Tromso weather in September 2025

Expect daytime maximum temperatures of 48°F in Tromso, Norway in September based on long-term weather averages. There are 3 hours of sunshine per day on average with 21 days with some rainfall and typically 3.7 inches of rainfall in the month.

  • 48°F maximum daytime temperature in September in Tromso48
    48°F max day temperature
  • 3 hours of sunshine per day
  • 21 days with some rainfall in September in Tromso21
    21 days with some rainfall
  • 36°F minimum night-time temperature in September in Tromso36
    36°F min night temperature
  • 13 hours of daylight per day in September in Tromso13
    13 hours of daylight per day
  • No heat & humidity in September in Tromso0
    No heat & humidity
  • 3.7 inches monthly rainfall in September in Tromso3.7
    3.7 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in September in Tromso1
    1 (Low) UV index
  • 50°F sea temperature in September in Tromso50
    50°F sea temperature

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The September weather guide for Norway (Tromso) 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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More about Norway

How warm is it in Tromso in September?

Daytime temperatures usually reach 48°F in Tromso in September, falling to 36°F at night.

How sunny is it in Tromso in September?

There are normally 3 hours of bright sunshine each day in Tromso in September - that's 23% of daylight hours.

How warm is the sea around Tromso in September?

The average sea temperature around Tromso in September is 50°F.

Does it rain in Tromso in September?

There are usually 21 days with some rain in Tromso in September and the average monthly rainfall is 3.7 inches.

Tromso September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 04:02 19:23
Monday, 15th September 2025 04:58 18:18
Tuesday, 30th September 2025 05:56 17:10

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