Astoria weather in September 2025

Expect 20°C 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.

  • 20°C maximum daytime temperature in September in Astoria20
    20°C max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in September in Astoria10
    10 days with some rainfall
  • 8°C minimum night-time temperature in September in Astoria8
    8°C 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
  • 84 mm monthly rainfall in September in Astoria84
    84 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Astoria5
    5 (Moderate) UV index
  • 14°C sea temperature in September in Astoria14
    14°C 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Astoria in September?

Daytime temperatures usually reach 20°C in Astoria in September, falling to 8°C 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 14°C.

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 84mm.

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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