Fullerton Weather Forecast

    • 51
    • 75

    Sunny

    • 52
    • 79

    Sunny

    • 57
    • 84

    Mostly Sunny

    • 55
    • 78

    Partly Sunny

    • 54
    • 73

    Mostly Sunny

    • 57
    • 78

    Sunny

Today 6 Mar Los Angeles County San Gabriel Valley

Sunny. Highs in the lower to mid 70s. North Winds 15 to 25 Mph.

Tonight 6 Mar Los Angeles County San Gabriel Valley

Mostly clear. Lows around 50. Northeast Winds around 15 Mph after midnight.

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Fullerton Temperature Statistics

March Temperature

Fullerton, Fullerton Municipal Airport (6.2 miles)

  • Lowest 3 March, 2026

    52 °F

  • Average March

    62.8 °F

  • Highest 1 March, 2026

    82 °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

    76.6 °F
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