National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat in the East; Critical Fire Weather in the Southwest

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Heat is likely to continue across the eastern U.S. through the Independence Day holiday weekend. Critical fire weather conditions will continue today and likely Tuesday across portions of the Four Corners and northern High Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

86°F

30°C

Humidity 63%
Wind Speed Vrbl 5 mph
Barometer 30.14 in (1019.2 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 29 Jun 11:53 am EDT
Extended Forecast for

2 Miles SSE Maryville TN

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly before 2pm. Mostly sunny and hot, with a high near 91. Heat index values as high as 99. Calm wind.

    High: 91 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 93. Heat index values as high as 102. Calm wind.

    High: 93 °F

    Hot

  • Tuesday Night

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

    Low: 75 °F

    Mostly Clear

  • Wednesday

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

    High: 95 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 75. South wind around 5 mph becoming calm.

    Low: 75 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 96. Calm wind becoming north around 5 mph.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 73.

    Low: 73 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 94.

    High: 94 °F

    Sunny then
    Chance
    T-storms

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly before 2pm. Mostly sunny and hot, with a high near 91. Heat index values as high as 99. Calm wind.
Tonight
Mostly clear, with a low around 73. Calm wind.
Tuesday
Mostly sunny and hot, with a high near 93. Heat index values as high as 102. Calm wind.
Tuesday Night
Mostly clear, with a low around 75. Calm wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95. Calm wind.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 75. South wind around 5 mph becoming calm.
Thursday
A 40 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 96. Calm wind becoming north around 5 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 73.
Friday
A 40 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 94.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly clear, with a low around 73.
Independence Day
A 40 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 74.
Sunday
Showers and thunderstorms likely. Mostly sunny and hot, with a high near 92. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Maryville TN
 35.71°N 83.97°W (Elev. 1056 ft)
Last Update:
10:16 am EDT Jun 29, 2026
Forecast Valid:
12pm EDT Jun 29, 2026-6pm EDT Jul 5, 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