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

72°F

22°C

Humidity 87%
Wind Speed Calm
Barometer 30.06 in (1016.7 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 19 Sep 3:53 am EDT
Extended Forecast for

Knoxville, McGhee Tyson Airport TN

  • Today

    Today: A 10 percent chance of showers and thunderstorms after 5pm. Sunny and hot, with a high near 93. Heat index values as high as 97. Calm wind becoming north around 5 mph in the afternoon.

    High: 93 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 70. Southeast wind around 5 mph becoming northwest after midnight.

    Low: 70 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 92. Heat index values as high as 95. Southwest wind 5 to 10 mph.

    High: 92 °F

    Hot

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly clear during the early evening, then becoming mostly cloudy, with a low around 69. South wind around 5 mph. Chance of precipitation is 10%.

    Low: 69 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91. Calm wind becoming west around 5 mph in the afternoon.

    High: 91 °F

    Mostly Sunny
    then 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 68. North wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 86. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 90%.

    High: 86 °F

    Chance
    Showers then
    Showers

  • Tuesday Night

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

    Low: 66 °F

    Showers

  • Wednesday

    Wednesday: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 81. Chance of precipitation is 80%.

    High: 81 °F

    Chance
    Showers then
    Showers

Detailed Forecast

Today
A 10 percent chance of showers and thunderstorms after 5pm. Sunny and hot, with a high near 93. Heat index values as high as 97. Calm wind becoming north around 5 mph in the afternoon.
Tonight
A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 70. Southeast wind around 5 mph becoming northwest after midnight.
Sunday
Mostly sunny and hot, with a high near 92. Heat index values as high as 95. Southwest wind 5 to 10 mph.
Sunday Night
A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly clear during the early evening, then becoming mostly cloudy, with a low around 69. South wind around 5 mph. Chance of precipitation is 10%.
Monday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91. Calm wind becoming west around 5 mph in the afternoon.
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 68. North wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%.
Tuesday
A chance of showers before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 86. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 90%.
Tuesday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 66. Chance of precipitation is 80%.
Wednesday
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 81. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm before 8pm, then showers likely. Low around 64. Chance of precipitation is 80%.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 79.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 61.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
Knoxville, McGhee Tyson Airport TN
 35.83°N 83.98°W (Elev. 961 ft)
Last Update:
2:26 am EDT Sep 19, 2026
Forecast Valid:
4am EDT Sep 19, 2026-6pm EDT Sep 25, 2026
 
Forecast Discussion
 
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Additional Resources

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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