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.

Overcast

70°F

21°C

Humidity 100%
Wind Speed S 3 mph
Barometer 30.02 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 24 May 12:55 am CDT
Extended Forecast for

3 Miles SSE Portland TN

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 63. South southeast wind around 5 mph.

    Low: 63 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after noon. High near 78. South wind around 5 mph becoming west southwest in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 78 °F

    Showers
    Likely then
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Patchy fog after midnight. Otherwise, increasing clouds, with a low around 64. North northwest wind around 5 mph becoming calm. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Chance
    T-storms then
    Chance
    Showers and
    Patchy Fog

  • Memorial Day

    Memorial Day: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1pm. High near 77. Calm wind becoming east around 5 mph. Chance of precipitation is 80%.

    High: 77 °F

    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm, then showers after 1am. Low around 66. East wind around 5 mph. Chance of precipitation is 80%.

    Low: 66 °F

    Showers

  • Tuesday

    Tuesday: Showers, with thunderstorms also possible after 10am. High near 80. South wind around 5 mph. Chance of precipitation is 90%.

    High: 80 °F

    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. South wind around 5 mph. Chance of precipitation is 50%.

    Low: 66 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. South southwest wind around 5 mph. Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm.

    Low: 66 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 63. South southeast wind around 5 mph.
Sunday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after noon. High near 78. South wind around 5 mph becoming west southwest in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday Night
A chance of showers and thunderstorms. Patchy fog after midnight. Otherwise, increasing clouds, with a low around 64. North northwest wind around 5 mph becoming calm. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Memorial Day
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1pm. High near 77. Calm wind becoming east around 5 mph. Chance of precipitation is 80%.
Monday Night
Showers likely and possibly a thunderstorm, then showers after 1am. Low around 66. East wind around 5 mph. Chance of precipitation is 80%.
Tuesday
Showers, with thunderstorms also possible after 10am. High near 80. South wind around 5 mph. Chance of precipitation is 90%.
Tuesday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. South wind around 5 mph. Chance of precipitation is 50%.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. South southwest wind around 5 mph. Chance of precipitation is 70%.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Friday
Showers and thunderstorms likely. Mostly cloudy, with a high near 80. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Portland TN
 36.56°N 86.5°W (Elev. 801 ft)
Last Update:
1:31 am CDT May 24, 2026
Forecast Valid:
1am CDT May 24, 2026-6pm CDT May 30, 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