South Dewees Island Weather Forecast

    • 55
    • 66

    Increasing Clouds

    • 56
    • 70

    Mostly Sunny

    • 58
    • 66

    Mostly Cloudy

    • 40
    • 70

    Mostly Cloudy

    • 35
    • 51

    Partly Sunny

    • 39
    • 53

    Mostly Sunny

Today 26 Dec Charleston

Mostly sunny. Highs in the mid 70s, except in the upper 60s near the coast. North Winds around 5 Mph, becoming east this afternoon.

Tonight 26 Dec Charleston

Partly cloudy. Lows in the mid 50s. South Winds around 5 Mph, becoming southwest after midnight.

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South Dewees Island Temperature Statistics

December Temperature

Mount Pleasant Regional-Faison Field (5 miles)

  • Lowest 15 December, 2025

    21.2 °F

  • Average December

    49.6 °F

  • Highest 24 December, 2025

    77 °F

Climate (2020–Present)

Mount Pleasant Regional-Faison Field (5 miles)

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  • Average Low 2020–2025

    58.3 °F

  • Average 2020–2025

    66.3 °F

  • Average High 2020–2025

    75.3 °F
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