Harleyville Weather Forecast

    • 55
    • 82

    Sunny

    • 64
    • 88

    Partly Sunny

    • 64
    • 91

    Partly Sunny

    • 63
    • 91

    Mostly Sunny

    • 65
    • 90

    Partly Sunny

    • 66
    • 90

    Slight Chance Thunderstorms

    • 66
    • 90

    Chance Thunderstorms

Today 15 May Dorchester

Sunny. Highs in the lower 80s. Light and variable Winds.

Tonight 15 May Dorchester

Clear. Lows in the mid 50s. South Winds around 5 Mph this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harleyville Temperature Statistics

May Temperature

Summerville Airport (14.3 miles)

  • Lowest 4 May, 2026

    46.4 °F

  • Average May

    67 °F

  • Highest 11 May, 2026

    87.8 °F

Climate (2021–Present)

Summerville Airport (14.3 miles)

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  • Average Low 2021–2026

    56 °F

  • Average 2021–2026

    65.6 °F

  • Average High 2021–2026

    76.7 °F
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