Sylmar Weather Forecast

    • 53
    • 74

    Increasing Clouds

    • 52
    • 72

    Mostly Cloudy

    • 51
    • 74

    Mostly Cloudy

    • 55
    • 68

    Rain Showers

    • 53
    • 64

    Rain Showers

    • 50
    • 63

    Rain Showers

Today 20 Dec Western San Fernando Valley

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

Tonight 20 Dec Western San Fernando Valley

Mostly clear in the evening then Areas of low Clouds and fog. Lows in the upper 40s to mid 50s.

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Sylmar Temperature Statistics

December Temperature

Los Angeles, Whiteman Airport (5 miles)

  • Lowest 1 December, 2025

    51.8 °F

  • Average December

    69.8 °F

  • Highest 10 December, 2025

    84.2 °F

Climate (2020–Present)

Los Angeles, Whiteman Airport (5 miles)

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  • Average Low 2020–2025

    60 °F

  • Average 2020–2025

    69.9 °F

  • Average High 2020–2025

    76.1 °F
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