Barnwell State Park Weather Forecast

    • 73
    • 96

    Mostly Sunny

    • 65
    • 91

    Partly Sunny

    • 63
    • 90

    Sunny

    • 66
    • 90

    Mostly Sunny

    • 69
    • 92

    Mostly Sunny

    • 70
    • 92

    Slight Chance Thunderstorms

Today 14 Sep Barnwell

Sunny. Highs in the mid 90s. North Winds around 5 Mph.

Tonight 14 Sep Barnwell

Mostly clear. Lows in the lower 70s. Northeast Winds around 5 Mph.

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Barnwell State Park Temperature Statistics

September Temperature

Barnwell Regional Airport (6.8 miles)

  • Lowest 8 September, 2026

    68 °F

  • Average September

    81.4 °F

  • Highest 4 September, 2026

    96.8 °F

Climate (2021–2026)

Barnwell Regional Airport (6.8 miles)

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  • Average Low 2021–2026

    54.5 °F

  • Average 2021–2026

    65.1 °F

  • Average High 2021–2026

    76.9 °F
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