Fullerton Weather Forecast

    • 58
    • 80

    Mostly Sunny

    • 58
    • 79

    Partly Sunny

    • 59
    • 79

    Partly Sunny

    • 62
    • 83

    Partly Sunny

    • 59
    • 87

    Partly Sunny

    • 57
    • 82

    Patchy Fog

    • 56
    • 79

    Mostly Cloudy

Today 23 Feb Los Angeles County San Gabriel Valley

Partly cloudy in the morning then sunny. Highs around 80.

Tonight 23 Feb Los Angeles County San Gabriel Valley

Partly cloudy in the evening then mostly clear. Lows in the upper 40s and 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 °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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