Downtown Knoxville Weather Forecast

    • 74
    • 98

    Hot

    • 74
    • 98

    Hot

    • 71
    • 96

    Chance Thunderstorms

    • 69
    • 93

    Chance Thunderstorms

    • 68
    • 89

    Chance Thunderstorms

    • 68
    • 90

    Slight Chance Thunderstorms

    • 70
    • 92

    Mostly Sunny

Today 3 Sep Knox

Sunny. Highs in the upper 90s. Light Winds. Heat index Values around 106.

Tonight 3 Sep Knox

Mostly clear. Lows in the mid 70s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Downtown Knoxville Temperature Statistics

September Temperature

Knoxville, McGhee Tyson Airport (10.6 miles)

  • Lowest 1 September, 2026

    72 °F

  • Average September

    82.5 °F

  • Highest 1 September, 2026

    93.9 °F

Climate (2021–2026)

Knoxville, McGhee Tyson Airport (10.6 miles)

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  • Average Low 2021–2026

    51.3 °F

  • Average 2021–2026

    61.2 °F

  • Average High 2021–2026

    71.7 °F
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