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

Portland Municipal Airport (K1M5)

Lat: 36.59°NLon: 86.48°WElev: 818ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

3 Miles SSE Portland TN

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely after 3am. Mostly cloudy, with a low around 62. East northeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 76. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 76 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 64. South wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 64 °F

    Showers

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 10am. Partly sunny, with a high near 79. West southwest wind 5 to 10 mph. Chance of precipitation is 70%.

    High: 79 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Patchy fog between 10pm and 3am. Otherwise, partly cloudy, with a low around 63. West southwest wind around 5 mph becoming calm. Chance of precipitation is 40%.

    Low: 63 °F

    Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. South wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 70%.

    Low: 64 °F

    Chance
    T-storms then
    Showers
    Likely

  • Memorial Day

    Memorial Day: Showers and possibly a thunderstorm. High near 78. Calm wind becoming south southeast around 5 mph. Chance of precipitation is 80%.

    High: 78 °F

    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. East southeast wind around 5 mph. Chance of precipitation is 70%.

    Low: 65 °F

    Showers
    Likely

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers likely after 3am. Mostly cloudy, with a low around 62. East northeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and possibly a thunderstorm. High near 76. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night
Showers and possibly a thunderstorm. Low around 64. South wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers likely, with thunderstorms also possible after 10am. Partly sunny, with a high near 79. West southwest wind 5 to 10 mph. Chance of precipitation is 70%.
Saturday Night
A chance of showers and thunderstorms. Patchy fog between 10pm and 3am. Otherwise, partly cloudy, with a low around 63. West southwest wind around 5 mph becoming calm. Chance of precipitation is 40%.
Sunday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. South wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 60%.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 70%.
Memorial Day
Showers and possibly a thunderstorm. High near 78. Calm wind becoming south southeast around 5 mph. Chance of precipitation is 80%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. East southeast wind around 5 mph. Chance of precipitation is 70%.
Tuesday
Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 80%.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 83. Chance of precipitation is 70%.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Portland TN
 36.56°N 86.5°W (Elev. 801 ft)
Last Update:
1:31 pm CDT May 21, 2026
Forecast Valid:
6pm CDT May 21, 2026-6pm CDT May 28, 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