Clarksville Weather Forecast

    • 29
    • 64

    Rain Showers

    • 36
    • 53

    Mostly Sunny

    • 38
    • 67

    Partly Sunny

    • 38
    • 57

    Partly Sunny

    • 46
    • 55

    Mostly Cloudy

    • 54
    • 72

    Mostly Cloudy

Today 18 Dec Southern Johnson County

Patchy fog early this morning. Cloudy with a chance of Showers Late, then Showers likely this morning. Sunny this afternoon. Highs in the lower 60s. Southeast Winds around 10 Mph, becoming northwest this afternoon. Gusts up to 30 Mph. Chance of rain 70 percent. Average rainfall 1/10 to 1/4 inch.

Tonight 18 Dec Southern Johnson County

Mostly clear. Much Colder with Lows in the upper 20s. West Winds 10 to 15 Mph. Gusts up to 30 Mph in the evening.

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Clarksville Temperature Statistics

December Temperature

Russelville Municipal Airport (25.5 miles)

  • Lowest 15 December, 2025

    18 °F

  • Average December

    37 °F

  • Highest 12 December, 2025

    66.2 °F

Climate (2020–Present)

Russelville Municipal Airport (25.5 miles)

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  • Average Low 2020–2025

    51.6 °F

  • Average 2020–2025

    62.7 °F

  • Average High 2020–2025

    74.3 °F
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