O'Neill Regional Park Weather Forecast

    • 63
    • 86

    Decreasing Clouds

    • 60
    • 80

    Mostly Sunny

    • 63
    • 84

    Mostly Sunny

    • 65
    • 86

    Mostly Sunny

    • 68
    • 90

    Mostly Sunny

    • 72
    • 93

    Mostly Sunny

    • 72
    • 95

    Sunny

Today 27 Sep Orange County Inland

Mostly sunny. Highs 93 to 97.

Tonight 27 Sep Orange County Inland

Mostly cloudy this evening. Becoming partly cloudy. Lows 60 to 67. Light Winds.

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O'Neill Regional Park Temperature Statistics

September Temperature

John Wayne-Orange County Airport (14.9 miles)

  • Lowest 2 September, 2026

    65.6 °F

  • Average September

    76.3 °F

  • Highest 9 September, 2026

    102.7 °F

Climate (2021–2026)

John Wayne-Orange County Airport (14.9 miles)

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  • Average Low 2021–2026

    59.1 °F

  • Average 2021–2026

    66.2 °F

  • Average High 2021–2026

    73.8 °F
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