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 SE 9 mph
Barometer 30.00 in
Dewpoint N/A
Visibility NA
Last update 3 Aug 5:15 pm CDT
Extended Forecast for

Portland TN

  • Tonight

    Tonight: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 4am. Mostly cloudy, with a low around 66. Southeast wind around 5 mph. Chance of precipitation is 40%.

    Low: 66 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. Southeast wind around 5 mph. Chance of precipitation is 30%.

    High: 79 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 66. East southeast wind around 5 mph becoming calm in the evening.

    Low: 66 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 80. Calm wind becoming southeast around 5 mph in the morning. Chance of precipitation is 50%.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 67. East southeast wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 83. Calm wind becoming southeast around 5 mph. Chance of precipitation is 50%.

    High: 83 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Calm wind becoming east around 5 mph.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67. East wind around 5 mph becoming calm.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 4am. Mostly cloudy, with a low around 66. Southeast wind around 5 mph. Chance of precipitation is 40%.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. Southeast wind around 5 mph. Chance of precipitation is 30%.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 66. East southeast wind around 5 mph becoming calm in the evening.
Tuesday
A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 80. Calm wind becoming southeast around 5 mph in the morning. Chance of precipitation is 50%.
Tuesday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 67. East southeast wind around 5 mph becoming calm. Chance of precipitation is 20%.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 83. Calm wind becoming southeast around 5 mph. Chance of precipitation is 50%.
Wednesday Night
Partly cloudy, with a low around 67. Calm wind.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Calm wind becoming east around 5 mph.
Thursday Night
Mostly clear, with a low around 67. East wind around 5 mph becoming calm.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 69.
Saturday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 70.
Sunday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
Portland TN
 36.58°N 86.53°W (Elev. 810 ft)
Last Update:
2:28 pm CDT Aug 3, 2025
Forecast Valid:
6pm CDT Aug 3, 2025-6pm CDT Aug 10, 2025
 
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