Mount San Antonio Weather Forecast

    • 30
    • 45

    Increasing Clouds

    • 29
    • 36

    Breezy

    • 32
    • 38

    Mostly Sunny

    • 36
    • 43

    Sunny

    • 36
    • 47

    Mostly Sunny

    • 38
    • 47

    Mostly Sunny

Today 2 Dec Eastern San Gabriel Mountains

Sunny in the morning then mostly cloudy. Highs from the mid 50s to mid 60s at low Elevations to the mid 40s to lower 50s at high Elevations.

Tonight 2 Dec Eastern San Gabriel Mountains

Partly cloudy. Lows in the mid 30s to mid 40s except the mid 20s to around 30 Colder Valleys and Slopes. West Winds around 15 Mph.

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Mount San Antonio Temperature Statistics

December Temperature

Brackett Field Airport (14.9 miles)

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  • Average December

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Climate (2020–Present)

Brackett Field Airport (14.9 miles)

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  • Average Low 2020–2025

    55.5 °F

  • Average 2020–2025

    67.6 °F

  • Average High 2020–2025

    75.5 °F
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