Williston Weather Forecast

    • 72
    • 93

    Chance Thunderstorms

    • 72
    • 91

    Rain Showers Likely

    • 72
    • 91

    Chance Thunderstorms

    • 71
    • 91

    Mostly Sunny

    • 68
    • 89

    Chance Thunderstorms

    • 67
    • 88

    Mostly Sunny

Today 11 Sep Barnwell

Partly sunny. A slight chance of Showers in the Morning, then a chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the lower 90s. Light and variable Winds, becoming south around 5 Mph in the afternoon. Chance of rain 50 percent.

Tonight 11 Sep Barnwell

Mostly cloudy. Near steady temperature in the mid 70s. 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

    81.7 °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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