Mount Williamson Weather Forecast

    • 34
    • 45

    Mostly Sunny

    • 36
    • 47

    Sunny

    • 34
    • 49

    Mostly Sunny

    • 31
    • 44

    Breezy

    • 34
    • 43

    Breezy

    • 37
    • 50

    Mostly Sunny

    • 35
    • 48

    Mostly Sunny

Today 17 Jan Eastern San Gabriel Mountains

Sunny. Highs from the lower to mid 50s at low Elevations to the 40s at high Elevations. West Winds around 15 Mph.

Tonight 17 Jan Eastern San Gabriel Mountains

Mostly clear. Lows in the mid 30s to mid 40s except the mid to upper 20s Colder Valleys and Slopes. West Winds around 15 Mph in the evening.

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Mount Williamson Temperature Statistics

January Temperature

Gray Butte Field Airport (16.8 miles)

  • Lowest 15 January, 2025

    28.4 °F

  • Average January

    44 °F

  • Highest 15 January, 2025

    56.1 °F

Climate (2020–Present)

Gray Butte Field Airport (16.8 miles)

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  • Average Low 2020–2025

    50.5 °F

  • Average 2020–2025

    64.8 °F

  • Average High 2020–2025

    78.8 °F
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