Mount San Antonio Weather Forecast

    • 55
    • 70

    Mostly Sunny

    • 54
    • 68

    Mostly Sunny

    • 54
    • 66

    Mostly Sunny

    • 54
    • 67

    Slight Chance Thunderstorms

    • 54
    • 66

    Chance Thunderstorms

    • 54
    • 66

    Mostly Sunny

Today 19 Aug Los Angeles County Mountains excluding the Santa Monica Range

Sunny. Highs from 92 to 101 at low Elevations to the 80s to around 90 at high Elevations. Northwest Winds 10 to 20 Mph shifting to the west in the afternoon.

Tonight 19 Aug Los Angeles County Mountains excluding the Santa Monica Range

Mostly clear. Lows from the mid 60s to lower 70s at low Elevations to the mid 50s to lower 60s in Colder Valleys and Peaks. West Winds 10 to 20 Mph in the evening.

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Mount San Antonio Temperature Statistics

August Temperature

Gray Butte Field Airport (19.3 miles)

  • Lowest 6 August, 2018

    64.4 °F
  • Average August

    83.8 °F
  • Highest 7 August, 2018

    104 °F

Climate (2011–Present)

Gray Butte Field Airport (19.3 miles)

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  • Average Low 2011–Present

    49.5 °F
  • Average 2011–Present

    63.8 °F
  • Average High 2011–Present

    77.3 °F
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