Sleepy Valley Weather Forecast

    • 48
    • 66

    Sunny

    • 48
    • 69

    Sunny

    • 49
    • 69

    Mostly Sunny

    • 52
    • 71

    Mostly Sunny

    • 51
    • 74

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

Today 5 Dec Western San Gabriel Mountains and Highway 14 Corridor

Sunny. Highs from the 60s at low Elevations to the mid 50s to around 60 at high Elevations. Northeast Winds around 15 Mph.

Tonight 5 Dec Western San Gabriel Mountains and Highway 14 Corridor

Clear. Lows in the 40s to around 50. Northeast Winds 15 to 25 Mph.

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Sleepy Valley Temperature Statistics

December Temperature

Los Angeles, Whiteman Airport (18 miles)

  • Lowest 1 December, 2025

    51.8 °F

  • Average December

    64 °F

  • Highest 1 December, 2025

    71.6 °F

Climate (2020–Present)

Los Angeles, Whiteman Airport (18 miles)

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  • Average Low 2020–2025

    60 °F

  • Average 2020–2025

    69.8 °F

  • Average High 2020–2025

    76 °F
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