Lake Hartwell State Park Weather Forecast

    • 32
    • 56

    Mostly Sunny

    • 31
    • 50

    Mostly Sunny

    • 36
    • 58

    Mostly Sunny

    • 43
    • 60

    Partly Sunny

    • 26
    • 59

    Mostly Sunny

    • 28
    • 45

    Partly Sunny

Today 10 Dec Greater Oconee

Mostly sunny. Highs in the mid 50s. West Winds 10 to 15 Mph with Gusts up to 35 Mph.

Tonight 10 Dec Greater Oconee

Mostly clear. Lows in the lower 30s. West Winds 10 to 15 Mph.

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Lake Hartwell State Park Temperature Statistics

December Temperature

Clemson, Clemson-Oconee County Airport (14.9 miles)

  • Lowest 4 December, 2025

    32 °F

  • Average December

    41.3 °F

  • Highest 2 December, 2025

    53.1 °F

Climate (2020–Present)

Clemson, Clemson-Oconee County Airport (14.9 miles)

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  • Average Low 2020–2025

    53.5 °F

  • Average 2020–2025

    62.5 °F

  • Average High 2020–2025

    72.1 °F
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