Barnwell State Park Weather Forecast

    • 67
    • 76

    Chance Thunderstorms

    • 66
    • 79

    Rain Showers Likely

    • 69
    • 86

    Rain Showers Likely

    • 69
    • 84

    Thunderstorms Likely

    • 68
    • 84

    Rain Showers Likely

    • 70
    • 84

    Rain Showers Likely

    • 71
    • 87

    Chance Thunderstorms

Today 3 Aug Barnwell

Showers likely with a chance of Thunderstorms. Near steady temperature in the mid 70s. Northeast Winds around 5 Mph. Chance of rain 60 percent.

Tonight 3 Aug Barnwell

Mostly cloudy with a chance of Showers. A chance of Thunderstorms, mainly this evening. Lows in the upper 60s. Northeast Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Barnwell State Park Temperature Statistics

August Temperature

Barnwell Regional Airport (6.8 miles)

  • Lowest 1 August, 2025

    75.2 °F

  • Average August

    83.1 °F

  • Highest 1 August, 2025

    95 °F

Climate (2020–Present)

Barnwell Regional Airport (6.8 miles)

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  • Average Low 2020–2025

    54.6 °F

  • Average 2020–2025

    65 °F

  • Average High 2020–2025

    76.7 °F
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