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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Current conditions at

Knoxville Downtown Airport (KDKX)

Lat: 35.97°NLon: 83.87°WElev: 827ft.

Fair

90°F

32°C

Humidity 63%
Wind Speed Calm
Barometer 30.12 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 15 Aug 1:55 pm EDT
Extended Forecast for

Knoxville TN

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms after 3pm. Sunny and hot, with a high near 91. Heat index values as high as 97. Calm wind.

    High: 91 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, mostly sunny and hot, with a high near 93. Heat index values as high as 96. Calm wind.

    High: 93 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 93. Calm wind.

    High: 93 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. Calm wind.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 94. Calm wind becoming northeast around 5 mph.

    High: 94 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 95.

    High: 95 °F

    Hot

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms after 3pm. Sunny and hot, with a high near 91. Heat index values as high as 97. Calm wind.
Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 70. Calm wind.
Saturday
Patchy fog before 9am. Otherwise, mostly sunny and hot, with a high near 93. Heat index values as high as 96. Calm wind.
Saturday Night
Mostly clear, with a low around 71. Calm wind.
Sunday
Sunny and hot, with a high near 93. Calm wind.
Sunday Night
Mostly clear, with a low around 72. Calm wind.
Monday
Sunny and hot, with a high near 94. Calm wind becoming northeast around 5 mph.
Monday Night
Mostly clear, with a low around 72.
Tuesday
Sunny and hot, with a high near 95.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 72.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 91.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Thursday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
Knoxville TN
 35.96°N 83.97°W (Elev. 938 ft)
Last Update:
1:43 pm EDT Aug 15, 2025
Forecast Valid:
2pm EDT Aug 15, 2025-6pm EDT Aug 21, 2025
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

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Chance of Precipitation