Johns Island Weather Forecast

    • 42
    • 59

    Mostly Sunny

    • 37
    • 54

    Mostly Sunny

    • 47
    • 59

    Mostly Sunny

    • 51
    • 65

    Mostly Sunny

    • 35
    • 67

    Mostly Sunny

    • 36
    • 50

    Partly Sunny

Today 10 Dec Charleston

Sunny. Highs in the upper 50s. Southwest Winds 10 to 15 Mph. Gusts up to 30 Mph in the afternoon.

Tonight 10 Dec Charleston

Mostly clear. Patchy fog. Lows in the lower 30s. Northwest Winds around 5 Mph.

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  • Temperature Real-Time

Johns Island Temperature Statistics

December Temperature

Charleston Executive Airport (1.2 miles)

  • Lowest 4 December, 2025

    37.4 °F

  • Average December

    50.9 °F

  • Highest 2 December, 2025

    59 °F

Climate (2020–Present)

Charleston Executive Airport (1.2 miles)

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  • Average Low 2020–2025

    58.9 °F

  • Average 2020–2025

    67.2 °F

  • Average High 2020–2025

    76 °F
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