Fullerton Weather Forecast

    • 63
    • 88

    Mostly Sunny

    • 63
    • 89

    Mostly Sunny

    • 63
    • 83

    Partly Sunny

    • 61
    • 81

    Partly Sunny

    • 60
    • 77

    Partly Sunny

    • 60
    • 78

    Partly Sunny

    • 60
    • 79

    Mostly Sunny

Today 17 Jun Orange County Inland

Mostly sunny. Highs 81 to 84 towards the coast to 90 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 17 Jun Orange County Inland

Mostly clear. Lows 59 to 64. Areas of Winds south 10 Mph this evening becoming light.

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Fullerton Temperature Statistics

June Temperature

Fullerton, Fullerton Municipal Airport (3.1 miles)

  • Lowest 4 June, 2025

    61.6 °F

  • Average June

    70.2 °F

  • Highest 1 June, 2025

    90.6 °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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