La Grande weather in September 2025

Expect 70°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in La Grande in September. Check more long-term weather averages for La Grande in September before you book your next holiday to Oregon in 2025/2026.

  • 70°F maximum daytime temperature in September in La Grande70
    70°F max day temperature
  • 9 hours of sunshine per day
  • 6 days with some rainfall in September in La Grande6
    6 days with some rainfall
  • 39°F minimum night-time temperature in September in La Grande39
    39°F min night temperature
  • 12 hours of daylight per day in September in La Grande12
    12 hours of daylight per day
  • No heat & humidity in September in La Grande0
    No heat & humidity
  • 1.1 inches monthly rainfall in September in La Grande1.1
    1.1 inches of monthly rainfall
  • UV (maximum) index 6 (High) in September in La Grande6
    6 (High) UV index

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The September weather guide for Oregon (La Grande) 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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How hot is it in La Grande in September?

Daytime temperatures usually reach 70°F in La Grande in September, falling to 39°F at night.

How sunny is it in La Grande in September?

There are normally 9 hours of bright sunshine each day in La Grande in September - that's 73% of daylight hours.

Does it rain in La Grande in September?

There are usually 6 days with some rain in La Grande in September and the average monthly rainfall is 1.1 inches.

La Grande September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:14 18:29
Monday, 15th September 2025 05:31 18:02
Tuesday, 30th September 2025 05:50 17:34

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