Rio Vista Park Weather Forecast

    • 74
    • 103

    Hot

    • 73
    • 100

    Hot

    • 72
    • 99

    Hot

    • 71
    • 97

    Hot

    • 70
    • 93

    Mostly Sunny

    • 67
    • 87

    Partly Sunny

Today 5 Oct Orange County Inland

Sunny, hot. Highs 99 to 103. Areas of Winds northwest to 10 Mph.

Tonight 5 Oct Orange County Inland

Mostly clear. Lows 71 to 74. Areas of Winds north to 10 Mph in the evening becoming light.

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Rio Vista Park Temperature Statistics

October Temperature

Fullerton, Fullerton Municipal Airport (6.8 miles)

  • Lowest 2 October, 2026

    64.9 °F

  • Average October

    82.8 °F

  • Highest 2 October, 2026

    104 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    57.2 °F

  • Average 2021–2026

    66.7 °F

  • Average High 2021–2026

    76.9 °F
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