Williston Weather Forecast

    • 53
    • 80

    Mostly Sunny

    • 54
    • 84

    Mostly Sunny

    • 56
    • 86

    Sunny

    • 62
    • 88

    Mostly Sunny

    • 66
    • 89

    Mostly Sunny

    • 68
    • 89

    Slight Chance Thunderstorms

Today 26 Sep Barnwell

Sunny. Highs in the lower 80s. North Winds around 5 Mph.

Tonight 26 Sep Barnwell

Mostly clear. Lows in the mid 50s. Northwest Winds around 5 Mph in the Evening, becoming light and variable.

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Williston Temperature Statistics

September Temperature

Barnwell Regional Airport (9.9 miles)

  • Lowest 24 September, 2026

    60.8 °F

  • Average September

    78.8 °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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