Rio Vista Park Weather Forecast

    • 43
    • 64

    Sunny

    • 45
    • 65

    Mostly Sunny

    • 49
    • 71

    Sunny

    • 49
    • 74

    Mostly Sunny

    • 51
    • 74

    Sunny

    • 54
    • 77

    Mostly Sunny

    • 55
    • 79

    Mostly Sunny

Today 8 Jan Orange County Inland

Mostly sunny. Highs 61 to 64. Areas of Winds northwest 10 to 15 Mph with Gusts to 30 Mph.

Tonight 8 Jan Orange County Inland

Mostly clear. Lows 41 to 44. Areas of Winds northeast 20 to 30 Mph with Gusts to 50 Mph. Becoming 30 to 40 Mph with Gusts to 65 Mph overnight.

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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 °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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