Williston Weather Forecast

    • 70
    • 89

    Decreasing Clouds

    • 71
    • 91

    Partly Sunny

    • 69
    • 88

    Rain Showers Likely

    • 65
    • 82

    Slight Chance Thunderstorms

    • 62
    • 80

    Partly Sunny

    • 61
    • 80

    Partly Sunny

Today 20 Sep Barnwell

Areas of fog in the morning. Partly sunny. Highs around 90. Northeast Winds around 5 Mph.

Tonight 20 Sep Barnwell

Partly cloudy. Lows in the lower 70s. Light and variable Winds.

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Williston Temperature Statistics

September Temperature

Barnwell Regional Airport (9.9 miles)

  • Lowest 17 September, 2026

    62.6 °F

  • Average September

    80.4 °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

    54.6 °F

  • Average 2021–2026

    65.1 °F

  • Average High 2021–2026

    76.9 °F
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