Harleyville Weather Forecast

    • 73
    • 93

    Thunderstorms

    • 71
    • 88

    Thunderstorms Likely

    • 71
    • 91

    Thunderstorms Likely

    • 73
    • 94

    Mostly Sunny

    • 75
    • 97

    Slight Chance Thunderstorms

    • 73
    • 97

    Chance Thunderstorms

Today 24 Jul Dorchester

Partly sunny. Showers and Thunderstorms likely this afternoon. Locally heavy rainfall possible this afternoon. Highs in the lower 90s. Heat index Values up to 106. Southwest Winds around 5 Mph. Chance of rain 70 percent.

Tonight 24 Jul Dorchester

Mostly cloudy. Showers and Thunderstorms Likely, mainly in the evening. Locally heavy rainfall possible in the evening. Lows in the mid 70s. South Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 70 percent.

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Harleyville Temperature Statistics

July Temperature

Summerville Airport (14.3 miles)

  • Lowest 2 July, 2026

    68 °F

  • Average July

    83.3 °F

  • Highest 9 July, 2026

    100.4 °F

Climate (2021–2026)

Summerville Airport (14.3 miles)

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  • Average Low 2021–2026

    56 °F

  • Average 2021–2026

    65.7 °F

  • Average High 2021–2026

    76.9 °F
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