Astoria weather in September 2025

Expect 68°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Astoria in September. Check more long-term weather averages for Astoria in September before you book your next holiday to Oregon in 2025/2026.

  • 68°F maximum daytime temperature in September in Astoria68
    68°F max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in September in Astoria10
    10 days with some rainfall
  • 46°F minimum night-time temperature in September in Astoria46
    46°F min night temperature
  • 12 hours of daylight per day in September in Astoria12
    12 hours of daylight per day
  • No heat & humidity in September in Astoria0
    No heat & humidity
  • 3.3 inches monthly rainfall in September in Astoria3.3
    3.3 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Astoria5
    5 (Moderate) UV index
  • 57°F sea temperature in September in Astoria57
    57°F sea temperature

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The September weather guide for Oregon (Astoria) 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 the USA

How hot is it in Astoria in September?

Daytime temperatures usually reach 68°F in Astoria in September, falling to 46°F at night.

How sunny is it in Astoria in September?

There are normally 7 hours of bright sunshine each day in Astoria in September - that's 56% of daylight hours.

How warm is the sea around Astoria in September?

The average sea temperature around Astoria in September is 57°F.

Does it rain in Astoria in September?

There are usually 10 days with some rain in Astoria in September and the average monthly rainfall is 3.3 inches.

Astoria September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:36 18:53
Monday, 15th September 2025 05:54 18:26
Tuesday, 30th September 2025 06:13 17:56

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