South Lake Weather Forecast

    • 48
    • 73

    Mostly Sunny

    • 49
    • 69

    Mostly Sunny

    • 50
    • 69

    Mostly Sunny

    • 53
    • 73

    Mostly Sunny

    • 55
    • 76

    Mostly Sunny

    • 56
    • 78

    Mostly Sunny

Today 4 Dec Orange County Inland

Mostly sunny. Highs around 71. Areas of Winds northeast 15 to 25 Mph with Gusts to 40 Mph becoming west to 10 Mph in the afternoon.

Tonight 4 Dec Orange County Inland

Mostly clear. Lows 42 to 47. Areas of Winds east to 10 Mph.

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South Lake Temperature Statistics

December Temperature

John Wayne-Orange County Airport (3.1 miles)

  • Lowest 1 December, 2025

    52 °F

  • Average December

    59.7 °F

  • Highest 1 December, 2025

    66 °F

Climate (2020–Present)

John Wayne-Orange County Airport (3.1 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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