Williston Weather Forecast

    • 70
    • 84

    Slight Chance Thunderstorms

    • 71
    • 89

    Slight Chance Thunderstorms

    • 72
    • 92

    Partly Sunny

    • 72
    • 93

    Mostly Sunny

    • 73
    • 94

    Mostly Sunny

    • 72
    • 95

    Mostly Sunny

    • 73
    • 95

    Slight Chance Thunderstorms

Today 29 Aug Barnwell

Mostly cloudy with a chance of Showers and Thunderstorms. Near steady temperature in the lower 80s. East Winds around 5 Mph. Chance of rain 40 percent.

Tonight 29 Aug Barnwell

Mostly cloudy. A slight chance of Showers and Thunderstorms this evening. Patchy fog after midnight. Lows around 70. Southeast Winds around 5 Mph this Evening, becoming light and variable. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Williston Temperature Statistics

August Temperature

Barnwell Regional Airport (9.9 miles)

  • Lowest 25 August, 2026

    68 °F

  • Average August

    81 °F

  • Highest 13 August, 2026

    98.6 °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

    76.8 °F
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