Williston Weather Forecast

    • 67
    • 87

    Thunderstorms Likely

    • 68
    • 87

    Chance Thunderstorms

    • 67
    • 89

    Rain Showers Likely

    • 64
    • 84

    Rain Showers

    • 61
    • 77

    Rain Showers

    • 58
    • 77

    Rain Showers Likely

Today 26 May Barnwell

Partly sunny. A slight chance of Showers and Thunderstorms late this Morning, then Showers and Thunderstorms likely this afternoon. Highs in the upper 80s. South Winds around 5 Mph. Chance of rain 70 percent.

Tonight 26 May Barnwell

Mostly cloudy. Showers and Thunderstorms likely in the Evening, then a slight chance of Showers after midnight. Patchy fog. Lows in the upper 60s. South Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Williston Temperature Statistics

May Temperature

Barnwell Regional Airport (9.9 miles)

  • Lowest 4 May, 2026

    46.4 °F

  • Average May

    70.7 °F

  • Highest 21 May, 2026

    93.2 °F

Climate (2021–Present)

Barnwell Regional Airport (9.9 miles)

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  • Average Low 2021–2026

    54.4 °F

  • Average 2021–2026

    65 °F

  • Average High 2021–2026

    76.7 °F
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