Thomaston Weather Forecast

    • 66
    • 88

    Slight Chance Thunderstorms

    • 65
    • 90

    Mostly Sunny

    • 65
    • 91

    Mostly Sunny

    • 65
    • 91

    Mostly Sunny

    • 64
    • 87

    Mostly Sunny

    • 65
    • 87

    Partly Sunny

Today 17 Sep Upson

Mostly sunny with a slight chance of Showers and Thunderstorms. Highs in the upper 80s. Light west Winds. Chance of rain 20 percent.

Tonight 17 Sep Upson

Mostly clear this Evening, then becoming partly cloudy. Lows in the mid 60s. Light and variable Winds.

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Thomaston Temperature Statistics

September Temperature

Thomaston, Thomaston-Upson County Airport (5.6 miles)

  • Lowest 10 September, 2025

    55.4 °F

  • Average September

    71.2 °F

  • Highest 5 September, 2025

    89.6 °F

Climate (2020–Present)

Thomaston, Thomaston-Upson County Airport (5.6 miles)

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  • Average Low 2020–2025

    54.4 °F

  • Average 2020–2025

    64 °F

  • Average High 2020–2025

    74.9 °F
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