Rio Vista Park Weather Forecast

    • 63
    • 88

    Sunny

    • 63
    • 84

    Mostly Sunny

    • 63
    • 81

    Partly Sunny

    • 59
    • 76

    Rain Showers

    • 57
    • 71

    Chance Rain Showers

    • 58
    • 73

    Mostly Sunny

    • 60
    • 79

    Mostly Sunny

Today 18 Oct Orange County Inland

Partly cloudy. Highs 75 to 78.

Tonight 18 Oct Orange County Inland

Clear. Lows 59 to 64. Areas of Winds west to 10 Mph this evening becoming light.

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Rio Vista Park Temperature Statistics

October Temperature

Fullerton, Fullerton Municipal Airport (6.8 miles)

  • Lowest 13 October, 2026

    53.7 °F

  • Average October

    79.2 °F

  • Highest 3 October, 2026

    105.7 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    57.2 °F

  • Average 2021–2026

    66.8 °F

  • Average High 2021–2026

    77 °F
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