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

Hazardous Weather Conditions

Current conditions at

Portland Municipal Airport (K1M5)

Lat: 36.59°NLon: 86.48°WElev: 818ft.

Fair

88°F

31°C

Humidity 70%
Wind Speed W 6 mph
Barometer 30.10 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 14 Aug 9:35 am CDT
Extended Forecast for

Portland TN

Heat Advisory August 14, 10:07am until August 16, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 14, 10:07am until August 16, 07:00pm

    NOW until 7:00pm Sun

    Heat Advisory

  • Today

    High: 94 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 75. Southwest wind around 5 mph becoming calm.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 95. Heat index values as high as 104. West southwest wind around 5 mph.

    High: 95 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75. Calm wind becoming southwest around 5 mph.

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 96. West wind 5 to 10 mph.

    High: 96 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. Southwest wind around 5 mph.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92. West southwest wind 5 to 10 mph becoming northwest in the afternoon.

    High: 92 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71. North northwest wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 94. Heat index values as high as 105. West southwest wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 75. Southwest wind around 5 mph becoming calm.
Saturday
Mostly sunny, with a high near 95. Heat index values as high as 104. West southwest wind around 5 mph.
Saturday Night
Mostly clear, with a low around 75. Calm wind becoming southwest around 5 mph.
Sunday
Sunny, with a high near 96. West wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 76. Southwest wind around 5 mph.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92. West southwest wind 5 to 10 mph becoming northwest in the afternoon.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71. North northwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 89. Calm wind becoming north around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Sunny, with a high near 93.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portland TN
 36.58°N 86.53°W (Elev. 810 ft)
Last Update:
7:21 am CDT Aug 14, 2026
Forecast Valid:
10am CDT Aug 14, 2026-6pm CDT Aug 20, 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