South Lake Weather Forecast

    • 50
    • 72

    Increasing Clouds

    • 51
    • 66

    Partly Sunny

    • 51
    • 67

    Mostly Cloudy

    • 50
    • 67

    Mostly Cloudy

    • 55
    • 65

    Rain

    • 54
    • 63

    Rain

Today 19 Dec San Diego County Inland Valleys

Mostly sunny. Highs 75 to 80. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 19 Dec San Diego County Inland Valleys

Partly cloudy. Patchy fog overnight. Lows 42 to 51 in wind Sheltered Areas to 49 to 54 in warmer Locations. Light Winds.

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South Lake Temperature Statistics

December Temperature

Carlsbad, McClellan-Palomar Airport (6.2 miles)

  • Lowest 2 December, 2025

    48 °F

  • Average December

    58.1 °F

  • Highest 9 December, 2025

    80.1 °F

Climate (2020–Present)

Carlsbad, McClellan-Palomar Airport (6.2 miles)

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  • Average Low 2020–2025

    56.6 °F

  • Average 2020–2025

    62.4 °F

  • Average High 2020–2025

    68.7 °F
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