Rio Vista Park Weather Forecast

    • 57
    • 73

    Mostly Cloudy

    • 57
    • 78

    Mostly Sunny

    • 58
    • 82

    Mostly Sunny

    • 58
    • 81

    Mostly Sunny

    • 58
    • 79

    Mostly Sunny

    • 58
    • 77

    Mostly Sunny

Today 17 May Orange County Inland

Mostly cloudy. Highs 70 to 73. Areas of Winds south 10 to 15 Mph. Gusts to 25 Mph this afternoon.

Tonight 17 May Orange County Inland

Partly cloudy. Lows 51 to 57. Areas of Winds south 10 to 15 Mph. Gusts to 25 Mph overnight.

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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

    66.9 °F

  • Highest 11 May, 2026

    85.6 °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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