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.

Mostly Cloudy

73°F

23°C

Humidity 90%
Wind Speed Calm
Barometer 29.91 in (1011.6 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 27 Jul 6:53 am EDT
Extended Forecast for

Maryville TN

  • Today

    Today: Mostly cloudy, then gradually becoming sunny and hot, with a high near 90. Heat index values as high as 97. Calm wind becoming north around 5 mph.

    High: 90 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 73. Calm wind becoming southwest around 5 mph.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4pm.  High near 92. Heat index values as high as 103. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 92 °F

    Chance
    Showers then
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely before 11pm, then showers likely between 11pm and 2am.  Partly cloudy, with a low around 71. West wind 5 to 10 mph becoming light northwest  after midnight.  Chance of precipitation is 60%.

    Low: 71 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Mostly sunny, with a high near 86. Calm wind becoming north around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65. North wind around 5 mph becoming calm  in the evening.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86. North wind around 5 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny and hot, with a high near 90. Heat index values as high as 97. Calm wind becoming north around 5 mph.
Tonight
Mostly clear, with a low around 73. Calm wind becoming southwest around 5 mph.
Tuesday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 92. Heat index values as high as 103. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and thunderstorms likely before 11pm, then showers likely between 11pm and 2am. Partly cloudy, with a low around 71. West wind 5 to 10 mph becoming light northwest after midnight. Chance of precipitation is 60%.
Wednesday
Mostly sunny, with a high near 86. Calm wind becoming north around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 65. North wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 86. North wind around 5 mph.
Thursday Night
Mostly clear, with a low around 65.
Friday
Mostly sunny, with a high near 88.
Friday Night
Mostly cloudy, with a low around 68.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Sunday
Showers and thunderstorms likely. Mostly cloudy, with a high near 85. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Maryville TN
 35.76°N 83.96°W (Elev. 994 ft)
2:26 am EDT Jul 27, 2026
6am EDT Jul 27, 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