Fullerton Municipal Airport Weather Forecast

    • 54
    • 82

    Mostly Sunny

    • 51
    • 82

    Mostly Sunny

    • 52
    • 80

    Mostly Sunny

    • 52
    • 80

    Partly Sunny

    • 52
    • 80

    Mostly Sunny

    • 51
    • 77

    Partly Sunny

    • 51
    • 75

    Partly Sunny

Today 14 Jan Orange County Inland

Mostly sunny. Highs 80 to 84. Areas of Winds northeast 10 to 20 Mph. Gusts to 40 Mph. Becoming 30 Mph this afternoon.

Tonight 14 Jan Orange County Inland

Mostly clear. Lows 54 to 58. Areas of Winds northeast 10 to 15 Mph. Gusts to 30 Mph. Becoming 25 Mph overnight.

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Fullerton Municipal Airport Temperature Statistics

January Temperature

Fullerton, Fullerton Municipal Airport (0 miles)

  • Lowest 9 January, 2026

    42.1 °F

  • Average January

    59.9 °F

  • Highest 11 January, 2026

    77 °F

Climate (2021–Present)

Fullerton, Fullerton Municipal Airport (0 miles)

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  • Average Low 2021–2026

    56.9 °F

  • Average 2021–2026

    66.1 °F

  • Average High 2021–2026

    76.4 °F
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