Barnwell State Park Weather Forecast

    • 28
    • 68

    Becoming Sunny

    • 26
    • 50

    Sunny

    • 35
    • 55

    Sunny

    • 37
    • 60

    Partly Sunny

    • 46
    • 62

    Rain Likely

    • 42
    • 62

    Chance Rain

Today 29 Dec Barnwell

Mostly cloudy in the Morning, then becoming mostly sunny. Less humid with Highs in the mid 60s. Temperature falling into the upper 50s in the afternoon. Southwest Winds 10 to 15 Mph, becoming west 15 to 20 Mph in the afternoon.

Tonight 29 Dec Barnwell

Mostly cloudy. Near steady temperature in the upper 50s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Barnwell State Park Temperature Statistics

December Temperature

Barnwell Regional Airport (6.8 miles)

  • Lowest 15 December, 2025

    19.4 °F

  • Average December

    48.1 °F

  • Highest 24 December, 2025

    78.8 °F

Climate (2020–Present)

Barnwell Regional Airport (6.8 miles)

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  • Average Low 2020–2025

    54.4 °F

  • Average 2020–2025

    64.8 °F

  • Average High 2020–2025

    76.5 °F
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