James Island Weather Forecast

    • 77
    • 95

    Chance Thunderstorms

    • 77
    • 93

    Mostly Sunny

    • 79
    • 92

    Slight Chance Thunderstorms

    • 79
    • 91

    Rain Showers Likely

    • 77
    • 90

    Rain Showers

    • 78
    • 89

    Thunderstorms Likely

Today 29 Jul Charleston

Mostly sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs in the mid 90s. Heat index Values up to 111. West Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 29 Jul Charleston

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Lows in the mid 70s. Heat index Values up to 106 early in the evening. Southwest Winds 5 to 10 Mph, becoming northwest after midnight. Chance of rain 20 percent.

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James Island Temperature Statistics

July Temperature

Charleston Executive Airport (4.3 miles)

  • Lowest 2 July, 2026

    71.6 °F

  • Average July

    84.1 °F

  • Highest 11 July, 2026

    98.6 °F

Climate (2021–2026)

Charleston Executive Airport (4.3 miles)

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  • Average Low 2021–2026

    58.9 °F

  • Average 2021–2026

    67.3 °F

  • Average High 2021–2026

    76.2 °F
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