Mount San Antonio Weather Forecast

    • 30
    • 38

    Mostly Sunny

    • 32
    • 47

    Breezy

    • 30
    • 45

    Mostly Sunny

    • 29
    • 43

    Partly Sunny

    • 31
    • 40

    Partly Sunny

    • 30
    • 41

    Chance Snow

Today 11 Dec Los Angeles County Mountains excluding the Santa Monica Range

Sunny. Highs mid 50s to mid 60s at low Elevations to the mid 40s to mid 50s at high Elevations. Northeast Winds 15 to 25 Mph with Gusts to 40 Mph.

Tonight 11 Dec Los Angeles County Mountains excluding the Santa Monica Range

Mostly clear. Lows from the mid 40s to around 50 at low Elevations to the mid 30s to around 40 in Colder Valleys and Peaks. Northeast Winds 15 to 25 Mph.

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Mount San Antonio Temperature Statistics

December Temperature

Gray Butte Field Airport (19.3 miles)

  • Lowest

  • Average December

  • Highest

Climate (2011–Present)

Gray Butte Field Airport (19.3 miles)

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  • Average Low 2011–Present

    49.8 °F
  • Average 2011–Present

    64.1 °F
  • Average High 2011–Present

    77.6 °F
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