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

79°F

26°C

Humidity 84%
Wind Speed SE 6 mph
Barometer 30.27 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 16 Sep 9:55 pm CDT
Extended Forecast for

4 Miles SSE Portland TN

Heat Advisory September 16, 10:17pm until September 19, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 16, 10:17pm until September 19, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Tonight

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98. Heat index values as high as 103. Calm wind becoming northwest around 5 mph.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 96. Heat index values as high as 104. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 96 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 71. East northeast wind around 5 mph becoming calm.

    Low: 71 °F

    Mostly Clear

  • Saturday

    Saturday: Patchy fog before 7am. Otherwise, sunny, with a high near 96. Calm wind becoming west around 5 mph.

    High: 96 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 73. Calm wind becoming south around 5 mph after midnight.

    Low: 73 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 96. South wind 5 to 10 mph becoming west in the afternoon.

    High: 96 °F

    Mostly Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 74. South wind around 5 mph.
Thursday
Sunny and hot, with a high near 98. Heat index values as high as 103. Calm wind becoming northwest around 5 mph.
Thursday Night
Mostly clear, with a low around 74. Calm wind.
Friday
Sunny, with a high near 96. Heat index values as high as 104. Calm wind becoming north northwest around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 71. East northeast wind around 5 mph becoming calm.
Saturday
Patchy fog before 7am. Otherwise, sunny, with a high near 96. Calm wind becoming west around 5 mph.
Saturday Night
Partly cloudy, with a low around 73. Calm wind becoming south around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 96. South wind 5 to 10 mph becoming west in the afternoon.
Sunday Night
Partly cloudy, with a low around 72. Calm wind becoming southeast around 5 mph in the evening.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 67.
Wednesday
A 30 percent chance of showers. Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Portland TN
 36.54°N 86.51°W (Elev. 801 ft)
Last Update:
1:31 pm CDT Sep 16, 2026
Forecast Valid:
10pm CDT Sep 16, 2026-6pm CDT Sep 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation