Rio Vista Park Weather Forecast

    • 59
    • 80

    Mostly Sunny

    • 59
    • 85

    Mostly Sunny

    • 58
    • 79

    Partly Sunny

    • 57
    • 77

    Mostly Sunny

    • 57
    • 77

    Mostly Sunny

    • 58
    • 78

    Sunny

Today 10 May Orange County Inland

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs 73 to 76 towards the coast to 79 to 82 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 10 May Orange County Inland

Partly cloudy. Patchy fog overnight. Lows 56 to 59. Areas of Winds south to 10 Mph in the evening becoming light.

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Rio Vista Park Temperature Statistics

May Temperature

Fullerton, Fullerton Municipal Airport (6.8 miles)

  • Lowest 6 May, 2026

    55.7 °F

  • Average May

    65.7 °F

  • Highest 7 May, 2026

    76.6 °F

Climate (2021–Present)

Fullerton, Fullerton Municipal Airport (6.8 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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