Fullerton Weather Forecast

    • 65
    • 84

    Increasing Clouds

    • 66
    • 83

    Mostly Cloudy

    • 68
    • 85

    Partly Sunny

    • 69
    • 87

    Partly Sunny

    • 71
    • 91

    Mostly Sunny

    • 73
    • 95

    Mostly Sunny

    • 71
    • 92

    Partly Sunny

Today 10 Jul Orange County Inland

Partly cloudy this morning. Becoming mostly sunny. Highs around 80 towards the coast to 81 to 85 farther inland. Areas of Winds south to 10 Mph.

Tonight 10 Jul Orange County Inland

Partly cloudy this evening. Becoming mostly cloudy. Patchy dense fog. Lows 59 to 65. Areas of Winds south 10 Mph this evening becoming light.

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Fullerton Temperature Statistics

July Temperature

Fullerton, Fullerton Municipal Airport (3.1 miles)

  • Lowest 3 July, 2026

    61.6 °F

  • Average July

    74 °F

  • Highest 6 July, 2026

    87.7 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (3.1 miles)

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  • Average Low 2021–2026

    57 °F

  • Average 2021–2026

    66.5 °F

  • Average High 2021–2026

    76.8 °F
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