Fullerton Weather Forecast

    • 62
    • 80

    Mostly Sunny

    • 62
    • 89

    Partly Sunny

    • 57
    • 84

    Sunny

    • 54
    • 77

    Partly Sunny

    • 52
    • 70

    Mostly Sunny

    • 52
    • 71

    Mostly Sunny

    • 52
    • 72

    Partly Sunny

Today 26 Feb Los Angeles County San Gabriel Valley

Partly cloudy in the morning then sunny. Highs in the upper 70s to mid 80s.

Tonight 26 Feb Los Angeles County San Gabriel Valley

Mostly clear. Lows in the mid 50s to mid 60s.

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Fullerton Temperature Statistics

February Temperature

Fullerton, Fullerton Municipal Airport (6.2 miles)

  • Lowest 20 February, 2026

    38.6 °F

  • Average February

    61.6 °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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