Ralph B Clark Regional Park Weather Forecast

    • 58
    • 77

    Increasing Clouds

    • 59
    • 76

    Mostly Cloudy

    • 60
    • 80

    Partly Sunny

    • 63
    • 85

    Partly Sunny

    • 64
    • 83

    Mostly Cloudy

    • 61
    • 80

    Mostly Cloudy

    • 59
    • 74

    Partly Sunny

Today 27 May Orange County Inland

Mostly cloudy early this morning. Becoming mostly sunny. Highs around 74 towards the coast to 76 to 80 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 27 May Orange County Inland

Partly cloudy this evening. Becoming mostly cloudy. Lows 53 to 59. Areas of Winds south 10 Mph this evening becoming light.

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Ralph B Clark Regional Park Temperature Statistics

May Temperature

Fullerton, Fullerton Municipal Airport (1.2 miles)

  • Lowest 8 May, 2025

    54.6 °F

  • Average May

    67.9 °F

  • Highest 10 May, 2025

    99.6 °F

Climate (2020–Present)

Fullerton, Fullerton Municipal Airport (1.2 miles)

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  • Average Low 2020–2025

    56.8 °F

  • Average 2020–2025

    66.1 °F

  • Average High 2020–2025

    76.8 °F
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