Rancho San Joaquin Weather Forecast

    • 50
    • 73

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 55
    • 80

    Sunny

    • 53
    • 78

    Mostly Sunny

    • 53
    • 77

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 53
    • 73

    Partly Sunny

Today 7 Dec Orange County Coastal

Partly cloudy this morning. Becoming mostly sunny. Highs 66 to 69 at the Beaches to 70 to 73 farther inland and near higher coastal Terrain. Light Winds becoming west 10 Mph this afternoon.

Tonight 7 Dec Orange County Coastal

Mostly clear this evening. Becoming partly cloudy. Lows 49 to 52. Light Winds.

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Rancho San Joaquin Temperature Statistics

December Temperature

John Wayne-Orange County Airport (1.9 miles)

  • Lowest 5 December, 2025

    48.9 °F

  • Average December

    60.1 °F

  • Highest 4 December, 2025

    71.1 °F

Climate (2020–Present)

John Wayne-Orange County Airport (1.9 miles)

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  • Average Low 2020–2025

    58.7 °F

  • Average 2020–2025

    65.6 °F

  • Average High 2020–2025

    73.4 °F
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