Black River - Mount Pleasant Plantation Weather Forecast

    • 66
    • 86

    Partly Sunny

    • 65
    • 86

    Mostly Sunny

    • 65
    • 86

    Mostly Sunny

    • 67
    • 83

    Slight Chance Thunderstorms

    • 68
    • 82

    Slight Chance Thunderstorms

    • 68
    • 84

    Chance Thunderstorms

Today 18 Sep Inland Georgetown

Mostly sunny. Highs in the mid 80s. Northwest Winds around 5 Mph, becoming south this afternoon.

Tonight 18 Sep Inland Georgetown

Partly cloudy. Patchy fog after midnight. Lows in the upper 60s. South Winds around 5 Mph in the Evening, becoming light and variable.

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Black River - Mount Pleasant Plantation Temperature Statistics

September Temperature

Georgetown County Airport (14.9 miles)

  • Lowest 16 September, 2025

    55.4 °F

  • Average September

    70.6 °F

  • Highest 5 September, 2025

    87.8 °F

Climate (2020–Present)

Georgetown County Airport (14.9 miles)

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  • Average Low 2020–2025

    54.7 °F

  • Average 2020–2025

    64 °F

  • Average High 2020–2025

    74.2 °F
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