Knoxville Weather Forecast

    • 73
    • 101

    Slight Chance Rain

    • 72
    • 101

    Hot

    • 71
    • 100

    Hot

    • 72
    • 99

    Hot

    • 69
    • 97

    Hot

    • 66
    • 92

    Partly Sunny

    • 66
    • 91

    Mostly Sunny

Today 17 Sep Southern Johnson County

Mostly sunny. Highs in the lower 90s.

Tonight 17 Sep Southern Johnson County

Mostly clear. A slight chance of Showers this evening. Lows in the lower 70s. East Winds around 5 Mph this Evening, becoming light and variable. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Knoxville Temperature Statistics

September Temperature

Russelville Municipal Airport (17.4 miles)

  • Lowest 8 September, 2026

    69.7 °F

  • Average September

    86.3 °F

  • Highest 8 September, 2026

    104.6 °F

Climate (2021–2026)

Russelville Municipal Airport (17.4 miles)

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  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    64 °F

  • Average High 2021–2026

    75.7 °F
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