Mount San Antonio Weather Forecast

    • 43
    • 51

    Sunny

    • 46
    • 57

    Sunny

    • 45
    • 56

    Mostly Sunny

    • 45
    • 56

    Sunny

    • 42
    • 54

    Mostly Sunny

    • 42
    • 50

    Mostly Sunny

Today 17 Oct Eastern San Gabriel Mountains

Sunny. Highs from the upper 60s and 70s at low Elevations to the 50s at high Elevations. Northeast Winds 15 to 25 Mph.

Tonight 17 Oct Eastern San Gabriel Mountains

Clear. Lows in the 50s to around 60 except the lower to mid 40s Colder Valleys and Slopes. Northeast Winds around 15 Mph.

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Mount San Antonio Temperature Statistics

October Temperature

Brackett Field Airport (14.9 miles)

  • Lowest 12 October, 2025

    53.6 °F

  • Average October

    68.9 °F

  • Highest 10 October, 2025

    87.8 °F

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

    75.6 °F
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