Dutch Harbor weather in September 2025

Expect 11°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Dutch Harbor in September. Check more long-term weather averages for Dutch Harbor in September before you book your next holiday to Alaska in 2025/2026.

  • 11°C maximum daytime temperature in September in Dutch Harbor11
    11°C max day temperature
  • 6 hours of sunshine per day
  • 21 days with some rainfall in September in Dutch Harbor21
    21 days with some rainfall
  • 6°C minimum night-time temperature in September in Dutch Harbor6
    6°C min night temperature
  • 13 hours of daylight per day in September in Dutch Harbor13
    13 hours of daylight per day
  • No heat & humidity in September in Dutch Harbor0
    No heat & humidity
  • 100 mm monthly rainfall in September in Dutch Harbor100
    100 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Dutch Harbor3
    3 (Moderate) UV index
  • 9°C sea temperature in September in Dutch Harbor9
    9°C sea temperature

More about Dutch Harbor

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The September weather guide for Alaska (Dutch Harbor) 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 Dutch Harbor in September?

Daytime temperatures usually reach 11°C in Dutch Harbor in September, falling to 6°C at night.

How sunny is it in Dutch Harbor in September?

There are normally 6 hours of bright sunshine each day in Dutch Harbor in September - that's 51% of daylight hours.

Is the sea cold around Dutch Harbor in September?

The average sea temperature around Dutch Harbor in September is 9°C.

Does it rain in Dutch Harbor in September?

There are usually 21 days with some rain in Dutch Harbor in September and the average monthly rainfall is 100mm.

Dutch Harbor September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 07:16 20:55
Monday, 15th September 2025 07:40 20:21
Tuesday, 30th September 2025 08:07 19:44

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