Williston Weather Forecast

    • 46
    • 75

    Mostly Sunny

    • 48
    • 75

    Sunny

    • 48
    • 76

    Sunny

    • 46
    • 73

    Sunny

    • 45
    • 67

    Sunny

    • 46
    • 71

    Mostly Sunny

Today 20 Oct Barnwell

Sunny. Highs in the upper 70s.

Tonight 20 Oct Barnwell

Mostly clear this Evening, then becoming partly cloudy. Lows in the mid 40s. North Winds around 5 Mph.

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  • Temperature Real-Time

Williston Temperature Statistics

October Temperature

Barnwell Regional Airport (9.9 miles)

  • Lowest 18 October, 2026

    46.4 °F

  • Average October

    70.2 °F

  • Highest 1 October, 2026

    89.6 °F

Climate (2021–2026)

Barnwell Regional Airport (9.9 miles)

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  • Average Low 2021–2026

    54.6 °F

  • Average 2021–2026

    65.1 °F

  • Average High 2021–2026

    76.9 °F
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