Rio Vista Park Weather Forecast

    • 51
    • 64

    Mostly Cloudy

    • 51
    • 65

    Chance Rain Showers

    • 48
    • 67

    Partly Sunny

    • 48
    • 68

    Mostly Sunny

    • 49
    • 69

    Mostly Sunny

    • 49
    • 71

    Mostly Sunny

Today 5 Jan Orange County Inland

Partly cloudy with a slight chance of Showers. Highs 61 to 64. Light Winds. Chance of measurable precipitation 20 percent.

Tonight 5 Jan Orange County Inland

Partly cloudy with a slight chance of Showers in the Evening, then mostly cloudy overnight. Lows 48 to 52. Light Winds becoming east 10 Mph overnight. Chance of measurable precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rio Vista Park Temperature Statistics

January Temperature

Fullerton, Fullerton Municipal Airport (6.8 miles)

  • Lowest 2 January, 2026

    54 °F

  • Average January

    60.5 °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

    56.8 °F

  • Average 2021–2026

    66.1 °F

  • Average High 2021–2026

    76.4 °F
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