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: Showers likely, mainly between 11pm and 4am. Cloudy, with a low around 51. Southwest wind around 5 mph becoming north northwest after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday

    Sunday: A 20 percent chance of showers between 10am and 11am. Mostly cloudy, then gradually becoming sunny, with a high near 64. North northwest wind around 5 mph becoming calm in the afternoon.

    High: 64 °F

    Slight Chance
    Showers then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 46. Calm wind becoming south around 5 mph.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Sunny, with a high near 75. South southwest wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 75 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60. South wind 5 to 10 mph.

    Low: 60 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 77. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 77 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight. Cloudy, with a low around 66. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 78. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    High: 78 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers, mainly before midnight. Low around 40. West southwest wind 15 to 20 mph becoming northwest in the evening. Winds could gust as high as 25 mph. Chance of precipitation is 80%.

    Low: 40 °F

    Showers then
    Chance
    Showers

Detailed Forecast

Tonight
Showers likely, mainly between 11pm and 4am. Cloudy, with a low around 51. Southwest wind around 5 mph becoming north northwest after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A 20 percent chance of showers between 10am and 11am. Mostly cloudy, then gradually becoming sunny, with a high near 64. North northwest wind around 5 mph becoming calm in the afternoon.
Sunday Night
Mostly clear, with a low around 46. Calm wind becoming south around 5 mph.
Monday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Sunny, with a high near 75. South southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60. South wind 5 to 10 mph.
Tuesday
Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 77. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Tuesday Night
A 20 percent chance of showers after midnight. Cloudy, with a low around 66. South wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 78. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Wednesday Night
Showers, mainly before midnight. Low around 40. West southwest wind 15 to 20 mph becoming northwest in the evening. Winds could gust as high as 25 mph. Chance of precipitation is 80%.
Thursday
A 20 percent chance of showers. Sunny, with a high near 53.
Thursday Night
Mostly clear, with a low around 39.
Friday
Mostly sunny, with a high near 64.
Friday Night
Partly cloudy, with a low around 46.
Saturday
Mostly sunny, with a high near 67.
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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:
7:46 pm CST Mar 7, 2026
Forecast Valid:
8pm CST Mar 7, 2026-6pm CDT Mar 14, 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