William R Mason Regional Park Weather Forecast

    • 53
    • 76

    Patchy Fog

    • 53
    • 74

    Patchy Fog

    • 53
    • 73

    Patchy Fog

    • 53
    • 75

    Mostly Sunny

    • 55
    • 77

    Mostly Sunny

    • 54
    • 75

    Partly Sunny

    • 54
    • 72

    Partly Sunny

Today 11 Dec Orange County Coastal

Patchy fog this morning. Mostly sunny. Highs 70 to 73 at the Beaches to 74 to 78 farther inland and near higher coastal Terrain. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 11 Dec Orange County Coastal

Mostly clear this evening. Becoming partly cloudy. Patchy fog overnight. Lows around 53. Light Winds.

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William R Mason Regional Park Temperature Statistics

December Temperature

John Wayne-Orange County Airport (2.5 miles)

  • Lowest 6 December, 2025

    48 °F

  • Average December

    60.2 °F

  • Highest 9 December, 2025

    82 °F

Climate (2020–Present)

John Wayne-Orange County Airport (2.5 miles)

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  • Average Low 2020–2025

    58.7 °F

  • Average 2020–2025

    65.6 °F

  • Average High 2020–2025

    73.3 °F
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