National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

A Few Clouds

77°F

25°C

Humidity 74%
Wind Speed NE 3 mph
Barometer 29.99 in (1014.3 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 10 Sep 11:53 pm EDT
Extended Forecast for

Louisville TN

  • Tonight

    Tonight: Partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 93. Heat index values as high as 99. Calm wind.

    High: 93 °F

    Hot

  • Friday Night

    Friday Night: A 10 percent chance of showers after 5am. Partly cloudy, with a low around 73. Calm wind.

    Low: 73 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after 2pm. High near 88. Heat index values as high as 98. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 80%.

    High: 88 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Low around 71. Southwest wind around 5 mph becoming calm. Chance of precipitation is 80%.

    Low: 71 °F

    Showers then
    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90. Calm wind. Chance of precipitation is 30%.

    High: 90 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 69. Calm wind.

    Low: 69 °F

    Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 71. Calm wind.
Friday
Mostly sunny and hot, with a high near 93. Heat index values as high as 99. Calm wind.
Friday Night
A 10 percent chance of showers after 5am. Partly cloudy, with a low around 73. Calm wind.
Saturday
Showers likely, then showers and possibly a thunderstorm after 2pm. High near 88. Heat index values as high as 98. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Low around 71. Southwest wind around 5 mph becoming calm. Chance of precipitation is 80%.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90. Calm wind. Chance of precipitation is 30%.
Sunday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 69. Calm wind.
Monday
Sunny, with a high near 89.
Monday Night
Mostly clear, with a low around 69.
Tuesday
Sunny and hot, with a high near 92.
Tuesday Night
Mostly clear, with a low around 70.
Wednesday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 91.
Wednesday Night
A 10 percent chance of showers and thunderstorms. Mostly clear, with a low around 70.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Louisville TN
 35.83°N 84.07°W (Elev. 814 ft)
Last Update:
7:06 pm EDT Sep 10, 2026
Forecast Valid:
11pm EDT Sep 10, 2026-6pm EDT Sep 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation