Williston Weather Forecast

    • 66
    • 91

    Sunny

    • 70
    • 93

    Slight Chance Thunderstorms

    • 70
    • 91

    Rain Showers Likely

    • 70
    • 91

    Slight Chance Thunderstorms

    • 70
    • 91

    Chance Thunderstorms

    • 70
    • 88

    Chance Thunderstorms

Today 17 Sep Barnwell

Sunny. Highs in the lower 90s. Light and variable Winds, becoming east around 5 Mph in the afternoon.

Tonight 17 Sep Barnwell

Clear. Lows in the mid 60s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Williston Temperature Statistics

September Temperature

Barnwell Regional Airport (9.9 miles)

  • Lowest 8 September, 2026

    68 °F

  • Average September

    81.2 °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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