Fullerton Weather Forecast

    • 56
    • 76

    Increasing Clouds

    • 56
    • 77

    Partly Sunny

    • 54
    • 70

    Mostly Cloudy

    • 52
    • 67

    Partly Sunny

    • 52
    • 67

    Partly Sunny

    • 55
    • 73

    Mostly Sunny

    • 58
    • 82

    Mostly Sunny

Today 1 May Los Angeles County San Gabriel Valley

Low Clouds and fog in the morning then sunny. Highs in the mid 70s to around 80.

Tonight 1 May Los Angeles County San Gabriel Valley

Mostly clear in the evening then low Clouds and fog. Lows in the mid 50s.

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Fullerton Temperature Statistics

May Temperature

Fullerton, Fullerton Municipal Airport (6.2 miles)

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  • Average May

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Climate (2021–Present)

Fullerton, Fullerton Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    57 °F

  • Average 2021–2026

    66.4 °F

  • Average High 2021–2026

    76.8 °F
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