Dangerous Heat Builds and Expands; Critical Fire Weather for the Southwest; Severe Thunderstorms for Plains and Midwest

Dangerous to record breaking heat will build across the center of the nation and slowly build eastward this week. Wildfire conditions remain critical for the Southwest and portions of the Great Basin through Monday. For the northern Plains and upper Midwest, severe thunderstorms with the potential for large to very large hail and severe winds are the primary hazards. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville Downtown Airport (KDKX)

Lat: 35.97°NLon: 83.87°WElev: 827ft.

Fog/Mist

72°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 30.06 in
Dewpoint 72°F (22°C)
Visibility 1.75 mi
Last update 29 Jun 5:35 am EDT
Extended Forecast for

Knoxville TN

  • Today

    Today: A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 3pm.  Patchy fog before 9am.  Otherwise, mostly sunny and hot, with a high near 91. Heat index values as high as 103. Calm wind.  Chance of precipitation is 20%.

    High: 91 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Tonight

    Tonight: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 94. Heat index values as high as 107. Calm wind.

    High: 94 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 96. Calm wind.

    High: 96 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 2pm.  Sunny and hot, with a high near 97. Calm wind.

    High: 97 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm.  Mostly clear, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 2pm.  Sunny and hot, with a high near 95.

    High: 95 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 3pm. Patchy fog before 9am. Otherwise, mostly sunny and hot, with a high near 91. Heat index values as high as 103. Calm wind. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 74. Calm wind.
Tuesday
Mostly sunny and hot, with a high near 94. Heat index values as high as 107. Calm wind.
Tuesday Night
Mostly clear, with a low around 75. Calm wind.
Wednesday
Sunny and hot, with a high near 96. Calm wind.
Wednesday Night
Mostly clear, with a low around 75. Calm wind.
Thursday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 97. Calm wind.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly clear, with a low around 73.
Friday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95.
Friday Night
A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 74.
Independence Day
A 30 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 94.
Saturday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
Knoxville TN
 35.96°N 83.91°W (Elev. 942 ft)
5:21 am EDT Jun 29, 2026
5am EDT Jun 29, 2026-6pm EDT Jul 5, 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