Sleepy Valley Weather Forecast

    • 60
    • 85

    Sunny

    • 61
    • 89

    Sunny

    • 63
    • 93

    Sunny

    • 70
    • 99

    Hot

    • 74
    • 102

    Hot

    • 75
    • 103

    Slight Chance Thunderstorms

Today 17 Aug Western San Gabriel Mountains and Highway 14 Corridor

Sunny. Highs from the mid 80s to around 90 at low Elevations to the mid 70s to around 80 at high Elevations. Southwest Winds 15 to 25 Mph in the afternoon.

Tonight 17 Aug Western San Gabriel Mountains and Highway 14 Corridor

Clear. Lows in the mid 50s to mid 60s. Southwest Winds around 15 Mph shifting to the north after midnight.

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Sleepy Valley Temperature Statistics

August Temperature

Los Angeles, Whiteman Airport (18 miles)

  • Lowest 1 August, 2025

    62.6 °F

  • Average August

    81.5 °F

  • Highest 7 August, 2025

    102.2 °F

Climate (2020–Present)

Los Angeles, Whiteman Airport (18 miles)

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  • Average Low 2020–2025

    60.1 °F

  • Average 2020–2025

    70 °F

  • Average High 2020–2025

    76.2 °F
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