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

27°F

-3°C

Humidity 100%
Wind Speed S 6 mph
Barometer 30.17 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 9 Dec 4:55 am CST
Extended Forecast for

Portland TN

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 46. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 46 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 38. South southwest wind 15 to 20 mph, with gusts as high as 25 mph.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 51. Southwest wind 15 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 30 mph.

    High: 51 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 27. West northwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 27 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 41. West wind around 5 mph.

    High: 41 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 32. South wind around 5 mph.

    Low: 32 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 51. South wind 5 to 10 mph becoming west in the afternoon.

    High: 51 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 27. Northwest wind around 5 mph.

    Low: 27 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 43. North wind around 5 mph.

    High: 43 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 46. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tonight
Mostly cloudy, with a low around 38. South southwest wind 15 to 20 mph, with gusts as high as 25 mph.
Wednesday
Partly sunny, with a high near 51. Southwest wind 15 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 30 mph.
Wednesday Night
Mostly cloudy, with a low around 27. West northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday
Mostly cloudy, with a high near 41. West wind around 5 mph.
Thursday Night
Mostly cloudy, with a low around 32. South wind around 5 mph.
Friday
Partly sunny, with a high near 51. South wind 5 to 10 mph becoming west in the afternoon.
Friday Night
Partly cloudy, with a low around 27. Northwest wind around 5 mph.
Saturday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 43. North wind around 5 mph.
Saturday Night
A chance of rain showers before midnight, then a slight chance of freezing rain. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 31.
Sunday Night
Mostly clear, with a low around 18.
Monday
A 20 percent chance of showers. Mostly sunny, with a high near 42.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portland TN
 36.58°N 86.5°W (Elev. 833 ft)
Last Update:
2:36 am CST Dec 9, 2025
Forecast Valid:
5am CST Dec 9, 2025-6pm CST Dec 15, 2025
 
Forecast Discussion
 
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Additional Resources

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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