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 66%
Wind Speed SW 5 mph
Barometer 29.97 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 11 Aug 6:55 pm CDT
Extended Forecast for

2 Miles ENE Portland TN

Heat Advisory August 11, 07:11pm until August 14, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 11, 07:11pm until August 14, 09:00pm

    NOW until 9:00pm Fri

    Heat Advisory

  • Tonight

    Low: 74 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly between 2pm and 4pm. Mostly sunny, with a high near 92. Heat index values as high as 105. West wind 5 to 10 mph.

    High: 92 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 75. South wind around 5 mph.

    Low: 75 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Partly sunny, with a high near 93. Heat index values as high as 105. West southwest wind 5 to 10 mph.

    High: 93 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 76. South southwest wind around 5 mph.

    Low: 76 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 95. West wind around 5 mph.

    High: 95 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 75. West northwest wind around 5 mph becoming calm.

    Low: 75 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 96. Calm wind becoming west around 5 mph in the afternoon.

    High: 96 °F

    Sunny

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between 8pm and 9pm. Partly cloudy, with a low around 74. South southwest wind around 5 mph. Chance of precipitation is 20%.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly between 2pm and 4pm. Mostly sunny, with a high near 92. Heat index values as high as 105. West wind 5 to 10 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 75. South wind around 5 mph.
Thursday
Partly sunny, with a high near 93. Heat index values as high as 105. West southwest wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 76. South southwest wind around 5 mph.
Friday
Sunny, with a high near 95. West wind around 5 mph.
Friday Night
Partly cloudy, with a low around 75. West northwest wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 96. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 76. Calm wind becoming south around 5 mph.
Sunday
Sunny and hot, with a high near 98.
Sunday Night
Mostly clear, with a low around 76.
Monday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 96.
Monday Night
Partly cloudy, with a low around 72.
Tuesday
Mostly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Portland TN
 36.6°N 86.47°W (Elev. 692 ft)
Last Update:
1:31 pm CDT Aug 11, 2026
Forecast Valid:
7pm CDT Aug 11, 2026-6pm CDT Aug 18, 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