Williston Weather Forecast

    • 64
    • 84

    Chance Thunderstorms

    • 62
    • 78

    Rain Showers Likely

    • 64
    • 82

    Rain Showers Likely

    • 58
    • 83

    Chance Thunderstorms

    • 58
    • 80

    Mostly Sunny

    • 60
    • 82

    Mostly Sunny

Today 30 May Barnwell

Partly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the lower 80s. West Winds around 5 Mph. Chance of rain 50 percent.

Tonight 30 May Barnwell

Mostly cloudy with a chance of Showers and Thunderstorms. Lows in the mid 60s. Light and variable Winds, becoming east around 5 Mph after midnight. Chance of rain 50 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

    71.6 °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

    54.5 °F

  • Average 2021–2026

    65 °F

  • Average High 2021–2026

    76.7 °F
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