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.

Fair

72°F

22°C

Humidity 91%
Wind Speed SE 3 mph
Barometer 30.01 in (1014.7 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 20 Sep 3:53 am EDT
Extended Forecast for

3 Miles SSW Seymour TN

  • Today

    Today: Sunny and hot, with a high near 91. Heat index values as high as 97. Calm wind becoming southwest around 5 mph.

    High: 91 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 69. Southwest wind around 5 mph becoming calm.

    Low: 69 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers and thunderstorms between 3pm and 5pm. Mostly sunny and hot, with a high near 91. Heat index values as high as 97. Calm wind becoming west around 5 mph. Chance of precipitation is 20%.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 87. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 90%.

    High: 87 °F

    Chance
    Showers then
    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 66. Northeast wind around 5 mph becoming calm. Chance of precipitation is 80%.

    Low: 66 °F

    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 79. Calm wind becoming northwest around 5 mph. Chance of precipitation is 90%.

    High: 79 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.

    Low: 60 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 8am. Partly sunny, with a high near 76. Chance of precipitation is 40%.

    High: 76 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny and hot, with a high near 91. Heat index values as high as 97. Calm wind becoming southwest around 5 mph.
Tonight
Mostly clear, with a low around 69. Southwest wind around 5 mph becoming calm.
Monday
A slight chance of showers and thunderstorms between 3pm and 5pm. Mostly sunny and hot, with a high near 91. Heat index values as high as 97. Calm wind becoming west around 5 mph. Chance of precipitation is 20%.
Monday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm. Chance of precipitation is 60%.
Tuesday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 87. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 90%.
Tuesday Night
Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 66. Northeast wind around 5 mph becoming calm. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 79. Calm wind becoming northwest around 5 mph. Chance of precipitation is 90%.
Wednesday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Thursday
A chance of showers, with thunderstorms also possible after 8am. Partly sunny, with a high near 76. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Seymour TN
 35.84°N 83.79°W (Elev. 1043 ft)
Last Update:
2:26 am EDT Sep 20, 2026
Forecast Valid:
4am EDT Sep 20, 2026-6pm EDT Sep 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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