Sullivan's Island Weather Forecast

    • 46
    • 54

    Rain Showers

    • 47
    • 56

    Chance Rain Showers

    • 34
    • 54

    Chance Rain Showers

    • 40
    • 50

    Mostly Sunny

    • 47
    • 59

    Mostly Sunny

    • 49
    • 61

    Partly Sunny

Today 6 Dec Charleston

A chance of Showers late this Morning, then Showers this afternoon. Highs in the lower 50s. Northwest Winds around 5 Mph. Chance of rain 90 percent.

Tonight 6 Dec Charleston

Cloudy. A chance of Showers in the evening. Areas of fog after midnight. Lows in the lower 40s. West Winds around 5 Mph, becoming north after midnight. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sullivan's Island Temperature Statistics

December Temperature

Mount Pleasant Regional-Faison Field (9.3 miles)

  • Lowest 4 December, 2025

    35.6 °F

  • Average December

    50.6 °F

  • Highest 1 December, 2025

    57.2 °F

Climate (2020–Present)

Mount Pleasant Regional-Faison Field (9.3 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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