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

73°F

23°C

Humidity 83%
Wind Speed S 6 mph
Barometer 30.02 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 13 Oct 9:15 pm CDT
Extended Forecast for

Portland TN

  • Tonight

    Tonight: Clear, with a low around 67. South southwest wind around 5 mph.

    Low: 67 °F

    Clear

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 88. Southwest wind 5 to 10 mph.

    High: 88 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Patchy fog between 11pm and midnight. Otherwise, mostly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Chance
    T-storms and
    Patchy Fog

  • Thursday

    Thursday: Mostly sunny, with a high near 89. Southwest wind 5 to 10 mph.

    High: 89 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. South southwest wind 5 to 10 mph.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 67. North northwest wind 15 to 20 mph, with gusts as high as 25 mph.

    High: 67 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 60. Northeast wind 10 to 15 mph.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 39. Northeast wind around 5 mph.

    Low: 39 °F

    Clear

Detailed Forecast

Tonight
Clear, with a low around 67. South southwest wind around 5 mph.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 88. Southwest wind 5 to 10 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Patchy fog between 11pm and midnight. Otherwise, mostly cloudy, with a low around 68. Calm wind.
Thursday
Mostly sunny, with a high near 89. Southwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 61. South southwest wind 5 to 10 mph.
Friday
Partly sunny, with a high near 67. North northwest wind 15 to 20 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 42. North wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 60. Northeast wind 10 to 15 mph.
Saturday Night
Clear, with a low around 39. Northeast wind around 5 mph.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 46.
Monday
Mostly sunny, with a high near 69.
Monday Night
Partly cloudy, with a low around 51.
Tuesday
Mostly sunny, with a high near 74.
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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:
6:56 pm CDT Oct 13, 2026
Forecast Valid:
9pm CDT Oct 13, 2026-6pm CDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation