Harleyville Weather Forecast

    • 69
    • 87

    Mostly Sunny

    • 69
    • 89

    Mostly Sunny

    • 71
    • 90

    Chance Thunderstorms

    • 72
    • 92

    Chance Thunderstorms

    • 72
    • 94

    Chance Thunderstorms

    • 72
    • 92

    Rain Showers Likely

    • 71
    • 91

    Chance Thunderstorms

Today 7 Sep Dorchester

Partly sunny. A slight chance of Showers and Thunderstorms this Morning, then a chance of Showers and Thunderstorms this afternoon. Highs in the mid 80s. Northeast Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 7 Sep Dorchester

Mostly clear. Lows around 70. Northeast Winds 5 to 10 Mph.

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Harleyville Temperature Statistics

September Temperature

Summerville Airport (14.3 miles)

  • Lowest 1 September, 2026

    73.4 °F

  • Average September

    82.4 °F

  • Highest 2 September, 2026

    95 °F

Climate (2021–2026)

Summerville Airport (14.3 miles)

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  • Average Low 2021–2026

    56.1 °F

  • Average 2021–2026

    65.8 °F

  • Average High 2021–2026

    77 °F
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