Knoxville Weather Forecast

    • 67
    • 93

    Chance Thunderstorms

    • 67
    • 91

    Slight Chance Thunderstorms

    • 67
    • 90

    Chance Thunderstorms

    • 66
    • 84

    Rain Showers Likely

    • 66
    • 85

    Chance Rain Showers

    • 66
    • 85

    Chance Rain Showers

Today 16 Sep Southern Johnson County

Mostly sunny. A slight chance of Showers and Thunderstorms this Morning, then a chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. Light and variable Winds, becoming northwest around 5 Mph this afternoon. Chance of rain 30 percent. Average rainfall less than 1/10 inch.

Tonight 16 Sep Southern Johnson County

Partly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Lows in the upper 60s. North Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 30 percent. Average rainfall less than 1/10 inch.

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Knoxville Temperature Statistics

September Temperature

Russelville Municipal Airport (17.4 miles)

  • Lowest 8 September, 2025

    53.1 °F

  • Average September

    72.4 °F

  • Highest 4 September, 2025

    93 °F

Climate (2020–Present)

Russelville Municipal Airport (17.4 miles)

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  • Average Low 2020–2025

    51.3 °F

  • Average 2020–2025

    62.5 °F

  • Average High 2020–2025

    74.1 °F
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