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

66°F

19°C

Humidity 73%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 31 May 2:55 am CDT
Extended Forecast for

Portland TN

  • Overnight

    Overnight: Partly cloudy, with a low around 61. East northeast wind around 5 mph.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. East wind around 5 mph becoming calm in the morning.

    High: 82 °F

    Partly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 65. South southeast wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 65 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Showers and thunderstorms likely before 1pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 81. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Partly cloudy, with a low around 61. North northeast wind around 5 mph. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 77. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 55. Northeast wind 5 to 10 mph.

    Low: 55 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. Northeast wind 5 to 10 mph.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 57. Northeast wind around 5 mph becoming calm.

    Low: 57 °F

    Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 61. East northeast wind around 5 mph.
Sunday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. East wind around 5 mph becoming calm in the morning.
Sunday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 65. South southeast wind around 5 mph becoming calm. Chance of precipitation is 20%.
Monday
Showers and thunderstorms likely before 1pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 81. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Partly cloudy, with a low around 61. North northeast wind around 5 mph. Chance of precipitation is 30%.
Tuesday
Sunny, with a high near 77. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Clear, with a low around 55. Northeast wind 5 to 10 mph.
Wednesday
Sunny, with a high near 78. Northeast wind 5 to 10 mph.
Wednesday Night
Clear, with a low around 57. Northeast wind around 5 mph becoming calm.
Thursday
Sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 62.
Friday
Sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 66.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portland TN
 36.58°N 86.53°W (Elev. 810 ft)
Last Update:
1:31 am CDT May 31, 2026
Forecast Valid:
3am CDT May 31, 2026-6pm CDT Jun 6, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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