Rio Vista Park Weather Forecast

    • 49
    • 65

    Decreasing Clouds

    • 46
    • 63

    Mostly Sunny

    • 48
    • 65

    Mostly Sunny

    • 50
    • 70

    Mostly Sunny

    • 51
    • 73

    Partly Sunny

    • 51
    • 74

    Mostly Sunny

Today 7 Jan Orange County Inland

Partly cloudy. A slight chance of Showers this morning. Highs 63 to 66. Light Winds becoming west 10 Mph this afternoon. Chance of measurable precipitation 20 percent.

Tonight 7 Jan Orange County Inland

Partly cloudy. Lows 45 to 49. Areas of Winds south 10 Mph in the evening becoming light.

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Rio Vista Park Temperature Statistics

January Temperature

Fullerton, Fullerton Municipal Airport (6.8 miles)

  • Lowest 5 January, 2026

    52 °F

  • Average January

    59.2 °F

  • Highest 1 January, 2026

    66.9 °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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