South Lake Weather Forecast

    • 51
    • 75

    Mostly Sunny

    • 50
    • 78

    Partly Sunny

    • 52
    • 73

    Mostly Cloudy

    • 51
    • 70

    Partly Sunny

    • 51
    • 69

    Partly Sunny

    • 52
    • 70

    Mostly Cloudy

Today 19 Jan Orange County Inland

Partly cloudy in the morning. Becoming mostly sunny. Highs around 74 towards the coast to 75 to 78 farther inland. Light Winds.

Tonight 19 Jan Orange County Inland

Mostly clear. Lows 50 to 54. Areas of Winds southwest 10 to 20 Mph becoming east 10 to 15 Mph overnight. Gusts to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Lake Temperature Statistics

January Temperature

John Wayne-Orange County Airport (3.1 miles)

  • Lowest 8 January, 2026

    48 °F

  • Average January

    61 °F

  • Highest 14 January, 2026

    82 °F

Climate (2021–Present)

John Wayne-Orange County Airport (3.1 miles)

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  • Average Low 2021–2026

    58.8 °F

  • Average 2021–2026

    65.7 °F

  • Average High 2021–2026

    73.3 °F
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