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.

Partly Cloudy

73°F

23°C

Humidity 87%
Wind Speed S 3 mph
Barometer 29.97 in (1013.6 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 19 Jul 3:53 am EDT
Extended Forecast for

Louisville TN

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Calm wind.

    Low: 73 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 87. Heat index values as high as 98. West wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 87 °F

    Chance
    T-storms then
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly between 2pm and 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 99. Calm wind becoming southwest around 5 mph.

    High: 89 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 74. Southwest wind around 5 mph becoming calm.

    Low: 74 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 89. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.

    High: 89 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 75. Southwest wind around 5 mph. Chance of precipitation is 80%.

    Low: 75 °F

    Chance
    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm, mainly before 2pm, then showers and thunderstorms likely after 2pm. High near 88. Chance of precipitation is 80%.

    High: 88 °F

    Showers then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 68. Chance of precipitation is 60%.

    Low: 68 °F

    T-storms
    Likely then
    Slight Chance
    Showers

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Calm wind.
Sunday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 87. Heat index values as high as 98. West wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 72. Calm wind.
Monday
A 30 percent chance of showers and thunderstorms, mainly between 2pm and 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 99. Calm wind becoming southwest around 5 mph.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 74. Southwest wind around 5 mph becoming calm.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 89. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 75. Southwest wind around 5 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm, mainly before 2pm, then showers and thunderstorms likely after 2pm. High near 88. Chance of precipitation is 80%.
Wednesday Night
Showers and thunderstorms likely before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 68. Chance of precipitation is 60%.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
Partly cloudy, with a low around 66.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Saturday
A 30 percent chance of showers and thunderstorms. Partly 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:
2:26 am EDT Jul 19, 2026
Forecast Valid:
4am EDT Jul 19, 2026-6pm EDT Jul 25, 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