South Whittier Weather Forecast

    • 72
    • 95

    Gradual Clearing

    • 72
    • 91

    Rain Showers Likely

    • 69
    • 88

    Rain Showers Likely

    • 67
    • 83

    Slight Chance Thunderstorms

    • 67
    • 86

    Mostly Sunny

    • 69
    • 86

    Patchy Fog

Today 16 Sep Los Angeles County San Gabriel Valley

Sunny after morning low Clouds and fog. Highs in the lower to mid 90s.

Tonight 16 Sep Los Angeles County San Gabriel Valley

Mostly clear in the evening then partly cloudy. Lows in the mid 60s to around 70.

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South Whittier Temperature Statistics

September Temperature

Fullerton, Fullerton Municipal Airport (5 miles)

  • Lowest 11 September, 2025

    64.9 °F

  • Average September

    74.4 °F

  • Highest 2 September, 2025

    97 °F

Climate (2020–Present)

Fullerton, Fullerton Municipal Airport (5 miles)

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  • Average Low 2020–2025

    56.7 °F

  • Average 2020–2025

    66.1 °F

  • Average High 2020–2025

    76.7 °F
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