Williston Weather Forecast

    • 75
    • 95

    Increasing Clouds

    • 74
    • 93

    Chance Thunderstorms

    • 71
    • 90

    Thunderstorms Likely

    • 71
    • 89

    Rain Showers Likely

    • 71
    • 87

    Thunderstorms Likely

    • 73
    • 89

    Chance Thunderstorms

Today 21 Jul Barnwell

Sunny. Highs in the mid 90s. South Winds 5 to 10 Mph.

Tonight 21 Jul Barnwell

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows in the mid 70s. South Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Williston Temperature Statistics

July Temperature

Barnwell Regional Airport (9.9 miles)

  • Lowest 2 July, 2026

    69.8 °F

  • Average July

    84.1 °F

  • Highest 4 July, 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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