Williston Weather Forecast

    • 73
    • 96

    Slight Chance Thunderstorms

    • 71
    • 95

    Thunderstorms Likely

    • 69
    • 87

    Chance Thunderstorms

    • 68
    • 89

    Slight Chance Thunderstorms

    • 69
    • 90

    Mostly Sunny

    • 71
    • 93

    Mostly Sunny

Today 5 Sep Barnwell

Areas of fog in the morning. Sunny. Highs in the mid 90s. Light and variable Winds, becoming southwest around 5 Mph in the afternoon.

Tonight 5 Sep Barnwell

Partly cloudy. Lows in the mid 70s. Southwest Winds around 5 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

    83.9 °F

  • Highest 1 September, 2026

    95 °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

    76.8 °F
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