Rio Vista Park Weather Forecast

    • 52
    • 82

    Mostly Sunny

    • 55
    • 80

    Mostly Sunny

    • 54
    • 80

    Partly Sunny

    • 53
    • 79

    Mostly Sunny

    • 53
    • 76

    Partly Sunny

    • 51
    • 75

    Mostly Sunny

    • 51
    • 72

    Partly Sunny

Today 15 Jan Orange County Inland

Mostly sunny. Highs 79 to 82. Areas of Winds east 10 to 15 Mph with Gusts to 30 Mph this morning becoming light.

Tonight 15 Jan Orange County Inland

Mostly clear. Lows 51 to 55. Light Winds.

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Rio Vista Park Temperature Statistics

January Temperature

Fullerton, Fullerton Municipal Airport (6.8 miles)

  • Lowest 9 January, 2026

    42.1 °F

  • Average January

    60.5 °F

  • Highest 13 January, 2026

    80.1 °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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