James Island Weather Forecast

    • 75
    • 92

    Chance Thunderstorms

    • 74
    • 84

    Thunderstorms

    • 74
    • 82

    Thunderstorms Likely

    • 73
    • 86

    Rain Showers Likely

    • 73
    • 89

    Chance Thunderstorms

    • 71
    • 88

    Mostly Sunny

Today 21 Aug Charleston

Mostly sunny. Highs in the lower 90s. Northwest Winds around 5 Mph.

Tonight 21 Aug Charleston

Partly cloudy in the Evening, then becoming mostly cloudy. A chance of Showers and Thunderstorms. Lows in the mid 70s. South Winds around 5 Mph, becoming west after midnight. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

James Island Temperature Statistics

August Temperature

Charleston Executive Airport (4.3 miles)

  • Lowest 3 August, 2025

    71.6 °F

  • Average August

    80 °F

  • Highest 1 August, 2025

    93.2 °F

Climate (2020–Present)

Charleston Executive Airport (4.3 miles)

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  • Average Low 2020–2025

    59.1 °F

  • Average 2020–2025

    67.4 °F

  • Average High 2020–2025

    76.1 °F
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