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

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

83°F

28°C

Humidity 70%
Wind Speed W 9 mph
Barometer 29.98 in (1013.9 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 20 Jul 10:53 am EDT
Extended Forecast for

Louisville TN

  • Today

    Today: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Heat index values as high as 100. Calm wind becoming west around 5 mph in the afternoon.

    High: 89 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 74. Southwest wind around 5 mph becoming calm. Chance of precipitation is 30%.

    Low: 74 °F

    Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Partly sunny and hot, with a high near 90. Heat index values as high as 100. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 74. Southwest wind around 5 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 74 °F

    Chance
    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 86. Southwest wind 5 to 10 mph. Chance of precipitation is 90%.

    High: 86 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Northeast wind around 5 mph. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 84. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of thunderstorms before 8pm, then a slight chance of showers after 2am. Partly cloudy, with a low around 67. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: A slight chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Heat index values as high as 100. Calm wind becoming west around 5 mph in the afternoon.
Tonight
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 74. Southwest wind around 5 mph becoming calm. Chance of precipitation is 30%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Partly sunny and hot, with a high near 90. Heat index values as high as 100. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 74. Southwest wind around 5 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 86. Southwest wind 5 to 10 mph. Chance of precipitation is 90%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Northeast wind around 5 mph. Chance of precipitation is 40%.
Thursday
A slight chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 84. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.
Thursday Night
A slight chance of thunderstorms before 8pm, then a slight chance of showers after 2am. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
Friday
A slight chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 20%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Louisville TN
 35.83°N 84.04°W (Elev. 863 ft)
Last Update:
7:06 am EDT Jul 20, 2026
Forecast Valid:
11am EDT Jul 20, 2026-6pm EDT Jul 26, 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