Barnwell Weather Forecast

    • 65
    • 89

    Decreasing Clouds

    • 64
    • 89

    Mostly Sunny

    • 63
    • 89

    Mostly Sunny

    • 64
    • 88

    Partly Sunny

    • 65
    • 87

    Partly Sunny

    • 67
    • 88

    Slight Chance Thunderstorms

Today 18 Sep Barnwell

Mostly sunny with isolated Showers. Near steady temperature in the upper 80s. Light and variable Winds. Chance of rain 20 percent.

Tonight 18 Sep Barnwell

Partly cloudy. Isolated Showers this evening. Lows in the mid 60s. Light and variable Winds. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Barnwell Temperature Statistics

September Temperature

Barnwell Regional Airport (1.9 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 (1.9 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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