William R Mason Regional Park Weather Forecast

    • 52
    • 73

    Increasing Clouds

    • 53
    • 69

    Mostly Cloudy

    • 52
    • 69

    Mostly Cloudy

    • 53
    • 69

    Mostly Cloudy

    • 56
    • 68

    Rain

    • 55
    • 65

    Rain

Today 19 Dec Orange County Coastal

Areas of fog this morning. Partly cloudy. Local visibility one quarter mile or less at Times this morning. Highs 65 to 68 at the Beaches to 69 to 73 farther inland and near higher coastal Terrain. Light Winds.

Tonight 19 Dec Orange County Coastal

Partly cloudy in the evening. Becoming cloudy overnight with patchy fog. Lows around 53. Light Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

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

    59.7 °F

  • Highest 9 December, 2025

    82 °F

Climate (2020–Present)

John Wayne-Orange County Airport (2.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    58.7 °F

  • Average 2020–2025

    65.6 °F

  • Average High 2020–2025

    73.3 °F
Get WillyWeather+ to remove ads