Fullerton Weather Forecast

    • 60
    • 74

    Increasing Clouds

    • 59
    • 77

    Mostly Sunny

    • 63
    • 87

    Mostly Sunny

    • 63
    • 90

    Mostly Sunny

    • 64
    • 91

    Patchy Fog

    • 64
    • 90

    Partly Sunny

    • 62
    • 84

    Partly Sunny

Today 28 Sep Orange County Inland

Low Clouds and drizzle in the morning then partly cloudy. Highs around 73. Light Winds.

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Fullerton Temperature Statistics

September Temperature

Fullerton, Fullerton Municipal Airport (3.1 miles)

  • Lowest 19 September, 2021

    57.2 °F

  • Average September

    73 °F

  • Highest 21 September, 2021

    102 °F

Climate (2010–Present)

Fullerton, Fullerton Municipal Airport (3.1 miles)

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  • Average Low 2010–Present

    57.7 °F

  • Average 2010–Present

    66.1 °F

  • Average High 2010–Present

    77.3 °F
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