Lake Hartwell State Park Weather Forecast

    • 62
    • 83

    Increasing Clouds

    • 63
    • 84

    Partly Sunny

    • 64
    • 86

    Mostly Sunny

    • 65
    • 89

    Mostly Sunny

    • 65
    • 87

    Partly Sunny

    • 65
    • 83

    Partly Sunny

Today 16 Sep Greater Oconee

Mostly cloudy with isolated Showers this Morning, then mostly sunny with scattered Showers with isolated Thunderstorms this afternoon. Highs in the lower 80s. Light and variable Winds, becoming southwest around 5 Mph this afternoon. Chance of rain 30 percent.

Tonight 16 Sep Greater Oconee

Partly cloudy. Lows in the lower 60s. North Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Hartwell State Park Temperature Statistics

September Temperature

Clemson, Clemson-Oconee County Airport (14.9 miles)

  • Lowest 11 September, 2025

    61 °F

  • Average September

    72.1 °F

  • Highest 12 September, 2025

    82.9 °F

Climate (2020–Present)

Clemson, Clemson-Oconee County Airport (14.9 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    53.5 °F

  • Average 2020–2025

    62.5 °F

  • Average High 2020–2025

    72.1 °F
Get WillyWeather+ to remove ads