Knoxville Weather Forecast

    • 66
    • 91

    Slight Chance Thunderstorms

    • 64
    • 89

    Chance Thunderstorms

    • 63
    • 87

    Chance Thunderstorms

    • 62
    • 82

    Chance Thunderstorms

    • 59
    • 77

    Chance Thunderstorms

    • 58
    • 76

    Chance Thunderstorms

Today 15 Sep Marion

Partly sunny. Highs around 90. Southeast Winds 5 to 10 Mph.

Tonight 15 Sep Marion

Mostly cloudy with a slight chance of Showers and Thunderstorms. Humid with Lows in the mid 60s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Knoxville Temperature Statistics

September Temperature

Knoxville (1.2 miles)

  • Lowest 7 September, 2025

    42.8 °F

  • Average September

    66.1 °F

  • Highest 13 September, 2025

    95 °F

Climate (2020–Present)

Knoxville (1.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    43 °F

  • Average 2020–2025

    52.5 °F

  • Average High 2020–2025

    62 °F
Get WillyWeather+ to remove ads