William R Mason Regional Park Weather Forecast

    • 66
    • 82

    Increasing Clouds

    • 65
    • 81

    Becoming Sunny

    • 63
    • 79

    Mostly Sunny

    • 63
    • 78

    Mostly Sunny

    • 63
    • 79

    Mostly Sunny

    • 64
    • 82

    Mostly Sunny

    • 65
    • 83

    Mostly Sunny

Today 13 Sep Orange County Coastal

Partly cloudy this morning. Becoming mostly sunny. Highs around 78 at the Beaches to 80 to 84 farther inland and near higher coastal Terrain. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 13 Sep Orange County Coastal

Mostly clear this evening. Becoming partly cloudy. Lows 64 to 67. Areas of Winds southwest 10 Mph becoming southeast overnight.

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William R Mason Regional Park Temperature Statistics

September Temperature

John Wayne-Orange County Airport (2.5 miles)

  • Lowest 2 September, 2026

    65.6 °F

  • Average September

    78.7 °F

  • Highest 9 September, 2026

    102.7 °F

Climate (2021–2026)

John Wayne-Orange County Airport (2.5 miles)

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  • Average Low 2021–2026

    59 °F

  • Average 2021–2026

    66.1 °F

  • Average High 2021–2026

    73.8 °F
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