The Dalles weather in September 2025

Expect 24°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in The Dalles in September. Check more long-term weather averages for The Dalles in September before you book your next holiday to Oregon in 2025/2026.

  • 24°C maximum daytime temperature in September in The Dalles24
    24°C max day temperature
  • 9 hours of sunshine per day
  • 5 days with some rainfall in September in The Dalles5
    5 days with some rainfall
  • 6°C minimum night-time temperature in September in The Dalles6
    6°C min night temperature
  • 12 hours of daylight per day in September in The Dalles12
    12 hours of daylight per day
  • No heat & humidity in September in The Dalles0
    No heat & humidity
  • 19 mm monthly rainfall in September in The Dalles19
    19 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in The Dalles5
    5 (Moderate) UV index

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The Dalles by month

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The September weather guide for Oregon (The Dalles) 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 The Dalles in September?

Daytime temperatures usually reach 24°C in The Dalles in September, falling to 6°C at night.

How sunny is it in The Dalles in September?

There are normally 9 hours of bright sunshine each day in The Dalles in September - that's 68% of daylight hours.

Does it rain in The Dalles in September?

There are usually 5 days with some rain in The Dalles in September and the average monthly rainfall is 19mm.

The Dalles September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:26 18:42
Monday, 15th September 2025 05:44 18:15
Tuesday, 30th September 2025 06:02 17:46

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