Lake Hartwell State Park Weather Forecast

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    Chance Thunderstorms

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    Chance Thunderstorms

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    • 95

    Chance Thunderstorms

    • 75
    • 96

    Slight Chance Thunderstorms

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    • 95

    Chance Thunderstorms

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    Chance Thunderstorms

Today 17 Jul Greater Oconee

Mostly sunny. A chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the lower 90s. Southwest Winds around 5 Mph. Chance of rain 40 percent. Heat index Values up to 103 in the afternoon.

Tonight 17 Jul Greater Oconee

Partly cloudy with scattered Showers with isolated Thunderstorms. Lows in the lower 70s. Light and variable Winds. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

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Lake Hartwell State Park Temperature Statistics

July Temperature

Clemson, Clemson-Oconee County Airport (14.9 miles)

  • Lowest 6 July, 2025

    70.6 °F

  • Average July

    81.7 °F

  • Highest 7 July, 2025

    96.7 °F

Climate (2020–Present)

Clemson, Clemson-Oconee County Airport (14.9 miles)

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  • Average Low 2020–2025

    53.6 °F

  • Average 2020–2025

    62.5 °F

  • Average High 2020–2025

    72.2 °F
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