Mount Williamson Weather Forecast

    • 57
    • 70

    Increasing Clouds

    • 52
    • 65

    Breezy

    • 51
    • 59

    Slight Chance Rain Showers

    • 58
    • 62

    Slight Chance Rain Showers

    • 60
    • 68

    Sunny

    • 60
    • 69

    Mostly Sunny

    • 60
    • 68

    Sunny

Today 26 Sep Eastern San Gabriel Mountains

Sunny. Highs from the 80s to lower 90s at low Elevations to the upper 60s to mid 70s at high Elevations.

Tonight 26 Sep Eastern San Gabriel Mountains

Mostly cloudy. Lows in the 50s to around 60. South Winds 15 to 25 Mph with Gusts to 35 Mph.

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Mount Williamson Temperature Statistics

September Temperature

Gray Butte Field Airport (16.8 miles)

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  • Average September

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Climate (2021–2025)

Gray Butte Field Airport (16.8 miles)

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  • Average Low 2021–2025

    47.9 °F

  • Average 2021–2025

    61.5 °F

  • Average High 2021–2025

    75 °F
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