Winnetka Weather Forecast

    • 48
    • 74

    Increasing Clouds

    • 46
    • 73

    Mostly Cloudy

    • 47
    • 74

    Mostly Cloudy

    • 52
    • 70

    Rain Showers

    • 50
    • 66

    Rain Showers

    • 47
    • 66

    Rain Showers

Today 20 Dec Western San Fernando Valley

Areas of low Clouds and fog in the morning then partly cloudy. Fog locally dense with visibility one quarter mile or less. Highs in the lower to mid 70s.

Tonight 20 Dec Western San Fernando Valley

Partly cloudy in the evening then mostly cloudy. Lows in the upper 40s to mid 50s.

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Winnetka Temperature Statistics

December Temperature

Van Nuys, Van Nuys Airport (4.3 miles)

  • Lowest 2 December, 2025

    43 °F

  • Average December

    62.8 °F

  • Highest 18 December, 2025

    86 °F

Climate (2020–Present)

Van Nuys, Van Nuys Airport (4.3 miles)

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  • Average Low 2020–2025

    56.5 °F

  • Average 2020–2025

    67.4 °F

  • Average High 2020–2025

    79.4 °F
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