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

64°F

18°C

Humidity 100%
Wind Speed Vrbl 3 mph
Barometer 29.81 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 4 Nov 1:15 pm CST
Extended Forecast for

Portland TN

  • This Afternoon

    This Afternoon: A 20 percent chance of showers before 2pm. Partly sunny, with a high near 72. West southwest wind 5 to 10 mph.

    High: 72 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 46. West wind around 5 mph becoming calm in the evening.

    Low: 46 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 67. Calm wind becoming west southwest around 5 mph.

    High: 67 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Patchy fog between 9pm and 3am. Otherwise, mostly cloudy, then gradually becoming clear, with a low around 43. Calm wind.

    Low: 43 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 62. Light north wind becoming north northwest 5 to 10 mph in the morning.

    High: 62 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 37. North wind 5 to 10 mph.

    Low: 37 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 55. North wind 5 to 10 mph.

    High: 55 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 32. North wind around 5 mph becoming calm.

    Low: 32 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58. Calm wind becoming north around 5 mph.

    High: 58 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers before 2pm. Partly sunny, with a high near 72. West southwest wind 5 to 10 mph.
Tonight
Partly cloudy, with a low around 46. West wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 67. Calm wind becoming west southwest around 5 mph.
Thursday Night
Patchy fog between 9pm and 3am. Otherwise, mostly cloudy, then gradually becoming clear, with a low around 43. Calm wind.
Friday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 62. Light north wind becoming north northwest 5 to 10 mph in the morning.
Friday Night
Partly cloudy, with a low around 37. North wind 5 to 10 mph.
Saturday
Sunny, with a high near 55. North wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 32. North wind around 5 mph becoming calm.
Sunday
Sunny, with a high near 58. Calm wind becoming north around 5 mph.
Sunday Night
Mostly clear, with a low around 32.
Monday
Sunny, with a high near 61.
Monday Night
Mostly clear, with a low around 35.
Tuesday
Mostly sunny, with a high near 62.
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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 pm CST Nov 4, 2026
Forecast Valid:
1pm CST Nov 4, 2026-6pm CST Nov 10, 2026
 
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