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

41°F

5°C

Humidity 100%
Wind Speed S 5 mph
Barometer 30.06 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 10 Nov 11:55 pm CST
Extended Forecast for

Portland TN

  • Overnight

    Overnight: Mostly clear, with a low around 41. Calm wind becoming south southwest around 5 mph.

    Low: 41 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Sunny, with a high near 70. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers, mainly before 8pm. Partly cloudy, with a low around 44. Southwest wind around 10 mph becoming northwest after midnight.

    Low: 44 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 54. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 54 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 33. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 33 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 47. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 47 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 26. North northwest wind around 5 mph becoming calm in the evening.

    Low: 26 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 48. Calm wind becoming north around 5 mph.

    High: 48 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 26. Calm wind.

    Low: 26 °F

    Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 41. Calm wind becoming south southwest around 5 mph.
Veterans Day
Sunny, with a high near 70. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 30 percent chance of showers, mainly before 8pm. Partly cloudy, with a low around 44. Southwest wind around 10 mph becoming northwest after midnight.
Thursday
Mostly sunny, with a high near 54. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 33. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 47. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 26. North northwest wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 48. Calm wind becoming north around 5 mph.
Saturday Night
Clear, with a low around 26. Calm wind.
Sunday
Sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 29.
Monday
Mostly sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 29.
Tuesday
Sunny, with a high near 54.
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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:
12:31 am CST Nov 11, 2026
Forecast Valid:
12am CST Nov 11, 2026-6pm CST Nov 17, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation