Rio Vista Park Weather Forecast

    • 45
    • 68

    Mostly Sunny

    • 47
    • 70

    Increasing Clouds

    • 46
    • 73

    Partly Sunny

    • 49
    • 73

    Partly Sunny

    • 49
    • 71

    Partly Sunny

    • 49
    • 71

    Mostly Sunny

    • 50
    • 75

    Partly Sunny

Today 24 Jan Orange County Inland

Patchy fog this morning. Partly cloudy. Highs 63 to 68. Light Winds.

Tonight 24 Jan Orange County Inland

Mostly clear. Lows around 44. Areas of Winds west 10 Mph with Gusts to 30 Mph. Becoming northeast 15 to 25 Mph with Gusts to 45 Mph overnight.

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Rio Vista Park Temperature Statistics

January Temperature

Fullerton, Fullerton Municipal Airport (6.8 miles)

  • Lowest 10 January, 2026

    39.7 °F

  • Average January

    61.6 °F

  • Highest 14 January, 2026

    85.6 °F

Climate (2021–Present)

Fullerton, Fullerton Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    56.9 °F

  • Average 2021–2026

    66.1 °F

  • Average High 2021–2026

    76.4 °F
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