Heat Across the Center of the Nation; Severe Thunderstorms Across the Great Lakes and Ohio Valley

Heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest into Monday. Fire weather concerns continue for portions of the Intermountain West. Active monsoonal moisture fuels thunderstorms over the Southwest with possible flash flooding. Tropical cyclone Fausto in the Pacific, should weaken as it approaches Hawaii; Dangerous surf, swells and rip currents are expected. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Partly Cloudy

89°F

32°C

Humidity 53%
Wind Speed W 8 mph
Barometer 29.91 in (1011.3 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 26 Jul 6:53 pm EDT
Extended Forecast for

3 Miles WNW Knoxville TN

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 3am.  Mostly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A 10 percent chance of showers before 7am.  Partly sunny and hot, with a high near 90. Heat index values as high as 96. Calm wind.

    High: 90 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers between 4am and 5am.  Partly cloudy, with a low around 74. Calm wind becoming southwest around 5 mph.  Chance of precipitation is 10%.

    Low: 74 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly after 2pm.  Cloudy through mid morning, then becoming mostly sunny and hot, with a high near 91. Heat index values as high as 102. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 70%.

    High: 91 °F

    Chance
    Showers then
    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, mainly before 8pm.  Partly cloudy, with a low around 71. West wind around 5 mph.  Chance of precipitation is 60%.

    Low: 71 °F

    T-storms
    Likely then
    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 87. North wind around 5 mph.

    High: 87 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66. North wind around 5 mph.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Tonight
A 30 percent chance of showers, mainly after 3am. Mostly cloudy, with a low around 72. Calm wind.
Monday
A 10 percent chance of showers before 7am. Partly sunny and hot, with a high near 90. Heat index values as high as 96. Calm wind.
Monday Night
A slight chance of showers between 4am and 5am. Partly cloudy, with a low around 74. Calm wind becoming southwest around 5 mph. Chance of precipitation is 10%.
Tuesday
Showers and thunderstorms likely, mainly after 2pm. Cloudy through mid morning, then becoming mostly sunny and hot, with a high near 91. Heat index values as high as 102. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Tuesday Night
Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 71. West wind around 5 mph. Chance of precipitation is 60%.
Wednesday
Mostly sunny, with a high near 87. North wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 66. North wind around 5 mph.
Thursday
Sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 66.
Friday
Mostly sunny, with a high near 87.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 69.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Knoxville TN
 35.99°N 83.99°W (Elev. 1070 ft)
2:26 pm EDT Jul 26, 2026
7pm EDT Jul 26, 2026-6pm EDT Aug 2, 2026
 
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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