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.

A Few Clouds

36°F

2°C

Humidity 93%
Wind Speed S 6 mph
Barometer 29.83 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 2 Jan 2:55 am CST
Extended Forecast for

Portland TN

  • Overnight

    Overnight: Mostly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of showers, mainly after 2pm. Cloudy, with a high near 49. Calm wind becoming east around 5 mph.

    High: 49 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly before 1am. Cloudy, with a low around 38. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 38 °F

    Showers
    Likely

  • Saturday

    Saturday: Mostly cloudy, with a high near 47. North wind around 5 mph.

    High: 47 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26. North wind around 5 mph.

    Low: 26 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 44. North wind around 5 mph becoming calm in the afternoon.

    High: 44 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 30. Calm wind becoming south around 5 mph after midnight.

    Low: 30 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 56. South southwest wind 5 to 10 mph.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44. South wind around 10 mph.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 36. Calm wind.
Friday
A 30 percent chance of showers, mainly after 2pm. Cloudy, with a high near 49. Calm wind becoming east around 5 mph.
Friday Night
Showers likely, mainly before 1am. Cloudy, with a low around 38. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly cloudy, with a high near 47. North wind around 5 mph.
Saturday Night
Mostly clear, with a low around 26. North wind around 5 mph.
Sunday
Mostly sunny, with a high near 44. North wind around 5 mph becoming calm in the afternoon.
Sunday Night
Partly cloudy, with a low around 30. Calm wind becoming south around 5 mph after midnight.
Monday
Sunny, with a high near 56. South southwest wind 5 to 10 mph.
Monday Night
Partly cloudy, with a low around 44. South wind around 10 mph.
Tuesday
Mostly cloudy, with a high near 61.
Tuesday Night
A 20 percent chance of showers. Cloudy, with a low around 51.
Wednesday
A 20 percent chance of showers. Mostly cloudy, with a high near 63.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 52.
Thursday
A 40 percent chance of showers. Mostly cloudy, with a high near 63.
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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:
12:31 am CST Jan 2, 2026
Forecast Valid:
3am CST Jan 2, 2026-6pm CST Jan 8, 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