Mount Williamson Weather Forecast

    • 60
    • 64

    Rain Showers Likely

    • 55
    • 61

    Chance Rain Showers

    • 57
    • 66

    Mostly Sunny

    • 59
    • 66

    Mostly Sunny

    • 61
    • 69

    Partly Sunny

    • 58
    • 67

    Slight Chance Rain Showers

    • 57
    • 67

    Mostly Sunny

Today 18 Sep Eastern San Gabriel Mountains

Showers with a slight chance of Thunderstorms in the Morning, then Showers likely with a chance of Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall. Highs from the 70s to around 80 at low Elevations to the upper 50s to mid 60s at high Elevations. Southeast Winds 15 to 25 Mph.

Tonight 18 Sep Eastern San Gabriel Mountains

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms in the Evening, then a slight chance of Showers and Thunderstorms after midnight. Some Thunderstorms may produce heavy rainfall. Lows in the 60s to around 70 except the lower to mid 50s Colder Valleys and Slopes. South Winds around 15 Mph.

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Mount Williamson Temperature Statistics

September Temperature

Gray Butte Field Airport (16.8 miles)

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Climate (2020–Present)

Gray Butte Field Airport (16.8 miles)

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  • Average Low 2020–2025

    49.8 °F

  • Average 2020–2025

    63.8 °F

  • Average High 2020–2025

    77.7 °F
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