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.

Fair

77°F

25°C

Humidity 89%
Wind Speed SE 3 mph
Barometer 30.04 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 25 May 3:55 pm CDT
Extended Forecast for

3 Miles SSE Portland TN

  • Memorial Day

    Memorial Day: A 40 percent chance of showers and thunderstorms. Cloudy, with a high near 78. Calm wind.

    High: 78 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Cloudy, with a low around 65. East northeast wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 65 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 78. East southeast wind 5 to 10 mph becoming south southwest in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 78 °F

    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then a chance of showers and thunderstorms after 4am. Cloudy, with a low around 66. South wind around 5 mph. Chance of precipitation is 70%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 81. South southwest wind around 5 mph. Chance of precipitation is 90%.

    High: 81 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 65. West southwest wind around 5 mph becoming calm. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    T-storms then
    Chance
    Showers and
    Patchy Fog

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 82. Calm wind becoming north northeast around 5 mph in the afternoon. Chance of precipitation is 50%.

    High: 82 °F

    Chance
    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 64. Northeast wind around 5 mph.

    Low: 64 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 77. East northeast wind around 5 mph. Chance of precipitation is 40%.

    High: 77 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Memorial Day
A 40 percent chance of showers and thunderstorms. Cloudy, with a high near 78. Calm wind.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Cloudy, with a low around 65. East northeast wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 78. East southeast wind 5 to 10 mph becoming south southwest in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then a chance of showers and thunderstorms after 4am. Cloudy, with a low around 66. South wind around 5 mph. Chance of precipitation is 70%.
Wednesday
Showers and possibly a thunderstorm. High near 81. South southwest wind around 5 mph. Chance of precipitation is 90%.
Wednesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 65. West southwest wind around 5 mph becoming calm. Chance of precipitation is 40%.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 82. Calm wind becoming north northeast around 5 mph in the afternoon. Chance of precipitation is 50%.
Thursday Night
Mostly cloudy, with a low around 64. Northeast wind around 5 mph.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 77. East northeast wind around 5 mph. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 77.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Sunday
Mostly sunny, with a high near 77.
Sunday Night
Mostly clear, with a low around 57.
Monday
Sunny, with a high near 77.
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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 25, 2026
Forecast Valid:
4pm CDT May 25, 2026-6pm CDT Jun 1, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation