Charleston Weather Forecast

    • 76
    • 90

    Slight Chance Thunderstorms

    • 76
    • 93

    Partly Sunny

    • 71
    • 85

    Mostly Sunny

    • 71
    • 84

    Mostly Sunny

    • 73
    • 84

    Slight Chance Thunderstorms

    • 74
    • 85

    Chance Thunderstorms

Today 13 Sep Charleston

Mostly sunny. Highs around 90. Heat index Values up to 105. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 13 Sep Charleston

Partly cloudy in the Evening, then becoming mostly clear. Lows in the mid 70s. Southwest Winds 5 to 10 Mph.

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  • Temperature Real-Time

Charleston Temperature Statistics

September Temperature

Charleston Executive Airport (6.8 miles)

  • Lowest 8 September, 2026

    73.4 °F

  • Average September

    81.9 °F

  • Highest 2 September, 2026

    91.4 °F

Climate (2021–2026)

Charleston Executive Airport (6.8 miles)

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  • Average Low 2021–2026

    59 °F

  • Average 2021–2026

    67.4 °F

  • Average High 2021–2026

    76.3 °F
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