Rio Vista Park Weather Forecast

    • 58
    • 73

    Mostly Cloudy

    • 58
    • 67

    Rain Showers

    • 55
    • 66

    Rain Showers Likely

    • 55
    • 65

    Rain Showers Likely

    • 52
    • 65

    Rain Showers Likely

    • 50
    • 65

    Chance Rain Showers

Today 30 Dec Orange County Inland

Sunny. Highs 71 to 74. Areas of Winds east 15 to 25 Mph with Gusts to 40 Mph becoming northeast 10 to 15 Mph with Gusts to 30 Mph in the afternoon.

Tonight 30 Dec Orange County Inland

Mostly clear. Lows 54 to 57. Areas of Winds northeast 10 to 15 Mph. Gusts to 30 Mph. Becoming 25 Mph overnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rio Vista Park Temperature Statistics

December Temperature

Fullerton, Fullerton Municipal Airport (6.8 miles)

  • Lowest 5 December, 2025

    45 °F

  • Average December

    60.2 °F

  • Highest 10 December, 2025

    84.9 °F

Climate (2020–Present)

Fullerton, Fullerton Municipal Airport (6.8 miles)

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  • Average Low 2020–2025

    56.8 °F

  • Average 2020–2025

    66.1 °F

  • Average High 2020–2025

    76.4 °F
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