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.

Overcast

45°F

7°C

Humidity 87%
Wind Speed SW 14 G 23 mph
Barometer 30.12 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 30 Nov 2:15 am CST
Extended Forecast for

Portland TN

  • Overnight

    Overnight: A 50 percent chance of showers, mainly after 3am. Cloudy, with a low around 33. South southwest wind around 15 mph, with gusts as high as 25 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 33 °F

    Chance
    Showers

  • Sunday

    Sunday: Cloudy, then gradually becoming mostly sunny, with a high near 43. West wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 43 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 22. North northwest wind around 5 mph becoming northeast after midnight.

    Low: 22 °F

    Partly Cloudy

  • Monday

    Monday: A chance of rain and snow showers between noon and 3pm, then a chance of rain showers after 3pm. Partly sunny, with a high near 45. East northeast wind around 5 mph. Chance of precipitation is 30%.

    High: 45 °F

    Mostly Sunny
    then Chance
    Rain/Snow

  • Monday Night

    Monday Night: Rain showers before 3am, then rain, possibly mixed with snow showers. Low around 30. Calm wind becoming northwest around 5 mph after midnight. Chance of precipitation is 90%.

    Low: 30 °F

    Showers then
    Rain/Snow

  • Tuesday

    Tuesday: A chance of rain and snow showers before 9am, then a chance of rain showers between 9am and noon. Mostly cloudy, with a high near 36. North northwest wind 5 to 10 mph. Chance of precipitation is 40%.

    High: 36 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 21. North northwest wind around 5 mph becoming calm in the evening.

    Low: 21 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, sunny, with a high near 44. Calm wind becoming south southwest around 5 mph.

    High: 44 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30. Calm wind becoming west around 5 mph after midnight.

    Low: 30 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 50 percent chance of showers, mainly after 3am. Cloudy, with a low around 33. South southwest wind around 15 mph, with gusts as high as 25 mph. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Cloudy, then gradually becoming mostly sunny, with a high near 43. West wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 22. North northwest wind around 5 mph becoming northeast after midnight.
Monday
A chance of rain and snow showers between noon and 3pm, then a chance of rain showers after 3pm. Partly sunny, with a high near 45. East northeast wind around 5 mph. Chance of precipitation is 30%.
Monday Night
Rain showers before 3am, then rain, possibly mixed with snow showers. Low around 30. Calm wind becoming northwest around 5 mph after midnight. Chance of precipitation is 90%.
Tuesday
A chance of rain and snow showers before 9am, then a chance of rain showers between 9am and noon. Mostly cloudy, with a high near 36. North northwest wind 5 to 10 mph. Chance of precipitation is 40%.
Tuesday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 21. North northwest wind around 5 mph becoming calm in the evening.
Wednesday
Patchy fog before 8am. Otherwise, sunny, with a high near 44. Calm wind becoming south southwest around 5 mph.
Wednesday Night
Mostly cloudy, with a low around 30. Calm wind becoming west around 5 mph after midnight.
Thursday
Mostly cloudy, with a high near 39.
Thursday Night
A 30 percent chance of snow showers. Mostly cloudy, with a low around 25.
Friday
Rain and snow showers likely. Mostly cloudy, with a high near 41. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of showers. Cloudy, with a low around 33.
Saturday
A 30 percent chance of showers. Mostly cloudy, with a high near 45.
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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:
11:31 pm CST Nov 29, 2025
Forecast Valid:
2am CST Nov 30, 2025-6pm CST Dec 6, 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