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

90°F

32°C

Humidity 22%
Wind Speed SW 8 mph
Barometer 29.99 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 30 Sep 3:35 pm CDT
Extended Forecast for

Portland TN

  • Tonight

    Tonight: Partly cloudy, with a low around 64. South wind around 5 mph.

    Low: 64 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 92. South wind around 10 mph.

    High: 92 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 71. South wind 5 to 10 mph.

    Low: 71 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Showers before 10am, then showers and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 84. South wind 5 to 10 mph becoming west northwest in the afternoon. Chance of precipitation is 80%.

    High: 84 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Cloudy, with a low around 62. Northeast wind around 5 mph. Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: Showers likely before 1pm. Mostly cloudy, with a high near 74. Northeast wind 5 to 10 mph. Chance of precipitation is 60%.

    High: 74 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 57. Northeast wind 5 to 10 mph.

    Low: 57 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 75. North northeast wind 5 to 10 mph.

    High: 75 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 52. North northeast wind 5 to 10 mph.

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 64. South wind around 5 mph.
Thursday
Mostly sunny, with a high near 92. South wind around 10 mph.
Thursday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 71. South wind 5 to 10 mph.
Friday
Showers before 10am, then showers and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 84. South wind 5 to 10 mph becoming west northwest in the afternoon. Chance of precipitation is 80%.
Friday Night
A chance of showers and thunderstorms. Cloudy, with a low around 62. Northeast wind around 5 mph. Chance of precipitation is 50%.
Saturday
Showers likely before 1pm. Mostly cloudy, with a high near 74. Northeast wind 5 to 10 mph. Chance of precipitation is 60%.
Saturday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 57. Northeast wind 5 to 10 mph.
Sunday
A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 75. North northeast wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 52. North northeast wind 5 to 10 mph.
Monday
Sunny, with a high near 75.
Monday Night
Clear, with a low around 45.
Tuesday
Sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portland TN
 36.58°N 86.53°W (Elev. 810 ft)
Last Update:
1:31 pm CDT Sep 30, 2026
Forecast Valid:
4pm CDT Sep 30, 2026-6pm CDT Oct 7, 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