Johns Island Weather Forecast

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    • 88

    Chance Thunderstorms

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    • 80

    Chance Thunderstorms

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    • 79

    Chance Thunderstorms

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    • 81

    Chance Thunderstorms

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    • 83

    Slight Chance Thunderstorms

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    Slight Chance Thunderstorms

Today 7 Sep Charleston

Partly sunny. A chance of Showers and Thunderstorms this afternoon. Highs in the upper 80s. North Winds around 5 Mph, becoming east this afternoon. Chance of rain 50 percent.

Tonight 7 Sep Charleston

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

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Johns Island Temperature Statistics

September Temperature

Charleston Executive Airport (1.2 miles)

  • Lowest 1 September, 2025

    64.4 °F

  • Average September

    74.6 °F

  • Highest 2 September, 2025

    84.2 °F

Climate (2020–Present)

Charleston Executive Airport (1.2 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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