Fullerton Weather Forecast

    • 53
    • 74

    Mostly Sunny

    • 56
    • 79

    Mostly Sunny

    • 56
    • 77

    Mostly Cloudy

    • 57
    • 77

    Patchy Fog

    • 59
    • 80

    Partly Sunny

    • 59
    • 83

    Mostly Cloudy

    • 58
    • 80

    Partly Sunny

Today 22 Feb Los Angeles County San Gabriel Valley

Sunny. Highs in the mid 70s.

Tonight 22 Feb Los Angeles County San Gabriel Valley

Mostly clear. Lows in the upper 40s to mid 50s.

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Fullerton Temperature Statistics

February Temperature

Fullerton, Fullerton Municipal Airport (6.2 miles)

  • Lowest 20 February, 2026

    39 °F

  • Average February

    61.2 °F

  • Highest 4 February, 2026

    90.6 °F

Climate (2021–Present)

Fullerton, Fullerton Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    56.9 °F

  • Average 2021–2026

    66.2 °F

  • Average High 2021–2026

    76.5 °F
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