Fullerton Weather Forecast

    • 62
    • 85

    Increasing Clouds

    • 61
    • 84

    Mostly Sunny

    • 62
    • 83

    Partly Sunny

    • 65
    • 87

    Partly Sunny

    • 66
    • 90

    Partly Sunny

    • 66
    • 90

    Partly Sunny

    • 65
    • 86

    Mostly Sunny

Today 5 Jul Orange County Inland

Partly cloudy this morning. Becoming mostly sunny. Highs 80 to 83 towards the coast to 85 to 88 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 5 Jul Orange County Inland

Mostly clear this evening. Becoming partly cloudy. Lows 55 to 62. Areas of Winds southwest to 10 Mph this evening becoming light.

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Fullerton Temperature Statistics

July Temperature

Fullerton, Fullerton Municipal Airport (3.1 miles)

  • Lowest 1 July, 2025

    61 °F

  • Average July

    68.3 °F

  • Highest 1 July, 2025

    79 °F

Climate (2020–Present)

Fullerton, Fullerton Municipal Airport (3.1 miles)

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  • Average Low 2020–2025

    56.8 °F

  • Average 2020–2025

    66.1 °F

  • Average High 2020–2025

    76.8 °F
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