Norwalk Weather Forecast

    • 61
    • 86

    Decreasing Clouds

    • 63
    • 91

    Partly Sunny

    • 73
    • 95

    Mostly Sunny

    • 75
    • 100

    Hot

    • 77
    • 98

    Hot

    • 75
    • 98

    Hot

Today 30 Sep Los Angeles County Inland Coast including Downtown Los Angeles

Low Clouds and fog in the morning then partly cloudy. Highs in the lower to mid 80s.

Tonight 30 Sep Los Angeles County Inland Coast including Downtown Los Angeles

Partly cloudy early then low Clouds and fog. Lows in the lower to mid 60s.

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Norwalk Temperature Statistics

September Temperature

Fullerton, Fullerton Municipal Airport (5.6 miles)

  • Lowest 2 September, 2026

    63.6 °F

  • Average September

    77.6 °F

  • Highest 9 September, 2026

    108.6 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (5.6 miles)

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  • Average Low 2021–2026

    57.2 °F

  • Average 2021–2026

    66.7 °F

  • Average High 2021–2026

    76.9 °F
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