Mount San Antonio Weather Forecast

    • 27
    • 37

    Mostly Sunny

    • 32
    • 45

    Mostly Sunny

    • 34
    • 48

    Partly Sunny

    • 42
    • 52

    Mostly Sunny

    • 42
    • 56

    Mostly Sunny

    • 36
    • 56

    Partly Sunny

    • 35
    • 49

    Mostly Cloudy

Today 29 Jan Eastern San Gabriel Mountains

Sunny. Highs from the 50s to around 60 at low Elevations to the upper 30s to mid 40s at high Elevations. West Winds around 15 Mph in the afternoon.

Tonight 29 Jan Eastern San Gabriel Mountains

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

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Mount San Antonio Temperature Statistics

January Temperature

Brackett Field Airport (14.9 miles)

  • Lowest 21 January, 2025

    37.4 °F

  • Average January

    57.7 °F

  • Highest 2 January, 2025

    80.6 °F

Climate (2020–Present)

Brackett Field Airport (14.9 miles)

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  • Average Low 2020–2025

    55.6 °F

  • Average 2020–2025

    67.7 °F

  • Average High 2020–2025

    75.5 °F
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