Williston Weather Forecast

    • 63
    • 87

    Partly Sunny

    • 64
    • 89

    Partly Sunny

    • 64
    • 89

    Mostly Sunny

    • 63
    • 89

    Mostly Sunny

    • 65
    • 87

    Partly Sunny

    • 66
    • 86

    Mostly Cloudy

    • 67
    • 88

    Slight Chance Thunderstorms

Today 17 Sep Barnwell

Mostly sunny. Near steady temperature in the mid 80s. West Winds around 5 Mph.

Tonight 17 Sep Barnwell

Partly cloudy. Lows in the mid 60s. West Winds around 5 Mph this Evening, becoming light and variable.

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Williston Temperature Statistics

September Temperature

Barnwell Regional Airport (9.9 miles)

  • Lowest 15 September, 2025

    55.4 °F

  • Average September

    73.3 °F

  • Highest 5 September, 2025

    93.2 °F

Climate (2020–Present)

Barnwell Regional Airport (9.9 miles)

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  • Average Low 2020–2025

    54.5 °F

  • Average 2020–2025

    64.9 °F

  • Average High 2020–2025

    76.5 °F
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