Denali National Park weather in September 2025

Expect 6°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Denali National Park in September. Check more long-term weather averages for Denali National Park in September before you book your next holiday to Alaska in 2025/2026.

  • 6°C maximum daytime temperature in September in Denali National Park6
    6°C max day temperature
  • 5 hours of sunshine per day
  • 15 days with some rainfall in September in Denali National Park15
    15 days with some rainfall
  • -3°C minimum night-time temperature in September in Denali National Park-3
    -3°C min night temperature
  • 13 hours of daylight per day in September in Denali National Park13
    13 hours of daylight per day
  • No heat & humidity in September in Denali National Park0
    No heat & humidity
  • 45 mm monthly rainfall in September in Denali National Park45
    45 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in September in Denali National Park2
    2 (Low) UV index

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The September weather guide for Alaska (Denali National Park) 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 cold is it in Denali National Park in September?

Daytime temperatures usually reach 6°C in Denali National Park in September, falling to -3°C at night.

How sunny is it in Denali National Park in September?

There are normally 5 hours of bright sunshine each day in Denali National Park in September - that's 36% of daylight hours.

Does it rain in Denali National Park in September?

There are usually 15 days with some rain in Denali National Park in September and the average monthly rainfall is 45mm. Rain may fall as snow in this month.

Denali National Park September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:48 20:13
Monday, 15th September 2025 06:27 19:24
Tuesday, 30th September 2025 07:08 18:32

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