William R Mason Regional Park Weather Forecast

    • 71
    • 83

    Rain Showers Likely

    • 72
    • 90

    Mostly Sunny

    • 73
    • 91

    Mostly Sunny

    • 73
    • 92

    Mostly Sunny

    • 71
    • 89

    Mostly Sunny

    • 68
    • 85

    Mostly Sunny

    • 66
    • 82

    Mostly Sunny

Today 6 Sep Orange County Coastal

Mostly cloudy with Showers likely this Morning, then partly cloudy with a chance of Showers this afternoon. Highs around 80 at the Beaches to 81 to 84 farther inland and near higher coastal Terrain. Light Winds becoming north 10 Mph this afternoon. Chance of measurable precipitation 60 percent.

Tonight 6 Sep Orange County Coastal

Partly cloudy. A slight chance of Showers this evening. Lows 69 to 72. Areas of Winds northwest 10 Mph. Chance of measurable precipitation 20 percent.

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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

    72.6 °F

  • Highest 1 September, 2026

    79.6 °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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