Harleyville Weather Forecast

    • 29
    • 49

    Mostly Cloudy

    • 28
    • 47

    Partly Sunny

    • 39
    • 59

    Mostly Sunny

    • 31
    • 56

    Mostly Sunny

    • 38
    • 60

    Mostly Sunny

    • 35
    • 61

    Mostly Sunny

    • 32
    • 56

    Mostly Sunny

Today 8 Dec Dorchester

Mostly cloudy. Highs in the upper 40s. North Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 8 Dec Dorchester

Mostly cloudy. Lows in the upper 20s. North Winds 5 to 10 Mph.

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Harleyville Temperature Statistics

December Temperature

Summerville Airport (14.3 miles)

  • Lowest 4 December, 2025

    33.8 °F

  • Average December

    49.5 °F

  • Highest 1 December, 2025

    55.4 °F

Climate (2020–Present)

Summerville Airport (14.3 miles)

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  • Average Low 2020–2025

    56.3 °F

  • Average 2020–2025

    65.8 °F

  • Average High 2020–2025

    76.7 °F
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