Harleyville Weather Forecast

    • 43
    • 68

    Mostly Cloudy

    • 37
    • 61

    Slight Chance Rain Showers

    • 29
    • 44

    Freezing Rain Likely

    • 34
    • 58

    Rain Showers

    • 18
    • 45

    Mostly Sunny

    • 23
    • 43

    Mostly Sunny

    • 26
    • 51

    Partly Sunny

Today 22 Jan Dorchester

Sunny. Highs in the upper 60s. Northwest Winds around 5 Mph.

Tonight 22 Jan Dorchester

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the mid 40s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harleyville Temperature Statistics

January Temperature

Summerville Airport (14.3 miles)

  • Lowest 16 January, 2026

    19.4 °F

  • Average January

    49.2 °F

  • Highest 10 January, 2026

    80.6 °F

Climate (2021–Present)

Summerville Airport (14.3 miles)

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  • Average Low 2021–2026

    56.2 °F

  • Average 2021–2026

    65.8 °F

  • Average High 2021–2026

    76.8 °F
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