Williston Weather Forecast

    • 69
    • 88

    Becoming Sunny

    • 70
    • 89

    Slight Chance Thunderstorms

    • 71
    • 91

    Slight Chance Thunderstorms

    • 72
    • 92

    Chance Thunderstorms

    • 71
    • 91

    Chance Thunderstorms

    • 71
    • 90

    Chance Thunderstorms

Today 8 Sep Barnwell

Sunny. Highs in the upper 80s. Northeast Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 8 Sep Barnwell

Mostly clear. Lows in the upper 60s. East Winds 5 to 10 Mph.

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Williston Temperature Statistics

September Temperature

Barnwell Regional Airport (9.9 miles)

  • Lowest 1 September, 2026

    71.6 °F

  • Average September

    83.6 °F

  • Highest 4 September, 2026

    96.8 °F

Climate (2021–2026)

Barnwell Regional Airport (9.9 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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