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.

Light Rain Fog/Mist

70°F

21°C

Humidity 93%
Wind Speed SE 6 mph
Barometer 30.10 in (1018.3 mb)
Dewpoint 68°F (20°C)
Visibility 6.00 mi
Last update 21 May 12:53 pm EDT
Extended Forecast for

Alcoa TN

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. High near 79. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms before 2am, then a chance of showers between 2am and 5am, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 65. Northeast wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Showers
    Likely

  • Friday

    Friday: Showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then showers and thunderstorms likely after 2pm. High near 82. Calm wind becoming south around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 82 °F

    Showers then
    T-storms
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms before 1am, then showers and possibly a thunderstorm between 1am and 2am, then showers after 2am. Low around 66. South wind around 5 mph becoming calm. Chance of precipitation is 90%.

    Low: 66 °F

    T-storms then
    Showers

  • Saturday

    Saturday: Showers, with thunderstorms also possible after 11am. High near 81. Southwest wind 5 to 10 mph. Chance of precipitation is 90%.

    High: 81 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Southwest wind around 5 mph becoming calm. Chance of precipitation is 60%.

    Low: 64 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 84. Calm wind becoming southwest around 5 mph. Chance of precipitation is 90%.

    High: 84 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 66. Chance of precipitation is 80%.

    Low: 66 °F

    Showers

  • Memorial Day

    Memorial Day: Showers likely, then showers and possibly a thunderstorm after 8am. High near 83. Chance of precipitation is 90%.

    High: 83 °F

    Showers

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 79. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms before 2am, then a chance of showers between 2am and 5am, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 65. Northeast wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then showers and thunderstorms likely after 2pm. High near 82. Calm wind becoming south around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and thunderstorms before 1am, then showers and possibly a thunderstorm between 1am and 2am, then showers after 2am. Low around 66. South wind around 5 mph becoming calm. Chance of precipitation is 90%.
Saturday
Showers, with thunderstorms also possible after 11am. High near 81. Southwest wind 5 to 10 mph. Chance of precipitation is 90%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Southwest wind around 5 mph becoming calm. Chance of precipitation is 60%.
Sunday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 84. Calm wind becoming southwest around 5 mph. Chance of precipitation is 90%.
Sunday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 66. Chance of precipitation is 80%.
Memorial Day
Showers likely, then showers and possibly a thunderstorm after 8am. High near 83. Chance of precipitation is 90%.
Monday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 66. Chance of precipitation is 80%.
Tuesday
Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 90%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 66. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 80%.
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ABOUT THIS FORECAST

 
Point Forecast:
Alcoa TN
 35.78°N 83.99°W (Elev. 869 ft)
Last Update:
1:06 pm EDT May 21, 2026
Forecast Valid:
1pm EDT May 21, 2026-6pm EDT May 27, 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