Alaska weather in August 2025

Expect 17°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Alaska in August. Check more long-term weather averages for Alaska in August before you book your next holiday to Alaska in 2025/2026.

  • 17°C maximum daytime temperature in August in Alaska (Anchorage)17
    17°C max day temperature
  • 7 hours of sunshine per day
  • 14 days with some rainfall in August in Alaska (Anchorage)14
    14 days with some rainfall
  • 9°C minimum night-time temperature in August in Alaska (Anchorage)9
    9°C min night temperature
  • 16 hours of daylight per day in August in Alaska (Anchorage)16
    16 hours of daylight per day
  • No heat & humidity in August in Alaska (Anchorage)0
    No heat & humidity
  • 64 mm monthly rainfall in August in Alaska (Anchorage)64
    64 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in August in Alaska (Anchorage)4
    4 (Moderate) UV index
  • 14°C sea temperature in August in Alaska (Anchorage)14
    14°C sea temperature

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The August weather guide for Alaska (Anchorage) 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.

Top Alaska destinations

Below are average maximum temperatures at popular countries, regions and places in Alaska in August. Select a holiday destination to see more weather parameters.

All Alaska destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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More about the USA

How warm is it in Alaska in August?

Daytime temperatures usually reach 17°C in Anchorage, Alaska in August, falling to 9°C at night.

How sunny is it in Alaska in August?

There are normally 7 hours of bright sunshine each day in Anchorage, Alaska in August - that's 41% of daylight hours.

How warm is the sea around Alaska in August?

The average sea temperature around Anchorage, Alaska in August is 14°C.

Does it rain in Alaska in August?

There are usually 14 days with some rain in Anchorage, Alaska in August and the average monthly rainfall is 64mm.

Alaska August sunrise & sunset times

Browse the sunrise and sunset times for Alaska in August 2025. Select a month to view Alaska sunrise and sunset times for the next 12 months. The Alaska sunrise and sunset times shown below are for Anchorage.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:33 21:37
Saturday, 16th August 2025 05:12 20:54
Sunday, 31st August 2025 05:50 20:08

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