Cooper River - Drum Island Weather Forecast

    • 67
    • 88

    Chance Thunderstorms

    • 67
    • 80

    Mostly Cloudy

    • 68
    • 79

    Chance Thunderstorms

    • 67
    • 81

    Chance Thunderstorms

    • 66
    • 83

    Partly Sunny

    • 67
    • 83

    Partly Sunny

    • 67
    • 81

    Partly Sunny

Today 7 Sep Charleston

Partly sunny with a chance of Showers and Thunderstorms. Highs in the upper 80s. East Winds around 5 Mph. Chance of rain 50 percent.

Tonight 7 Sep Charleston

Mostly cloudy. A chance of Showers and Thunderstorms, mainly this evening. Lows in the upper 60s. Northeast Winds around 5 Mph, becoming north 10 to 15 Mph with Gusts up to 25 Mph after midnight. Chance of rain 50 percent.

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Cooper River - Drum Island Temperature Statistics

September Temperature

Charleston Executive Airport (8.1 miles)

  • Lowest 1 September, 2025

    64.4 °F

  • Average September

    75.5 °F

  • Highest 5 September, 2025

    87.8 °F

Climate (2020–Present)

Charleston Executive Airport (8.1 miles)

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  • Average Low 2020–2025

    59.1 °F

  • Average 2020–2025

    67.3 °F

  • Average High 2020–2025

    76.1 °F
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