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.

Mostly Cloudy

68°F

20°C

Humidity 94%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 15 Sep 12:35 am CDT
Extended Forecast for

Portland TN

  • Overnight

    Overnight: Partly cloudy, with a low around 65. Southeast wind around 5 mph becoming calm.

    Low: 65 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 89. South southeast wind around 5 mph.

    High: 89 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. East southeast wind around 5 mph becoming calm.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 88. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 88 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 61. East northeast wind around 5 mph becoming calm.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 88. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60. East northeast wind around 5 mph becoming calm.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 90. Calm wind becoming southeast around 5 mph.

    High: 90 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. East wind around 5 mph becoming calm.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 65. Southeast wind around 5 mph becoming calm.
Monday
Mostly sunny, with a high near 89. South southeast wind around 5 mph.
Monday Night
Mostly clear, with a low around 64. East southeast wind around 5 mph becoming calm.
Tuesday
Mostly sunny, with a high near 88. Calm wind becoming north northeast around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 61. East northeast wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 88. Calm wind becoming northeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 60. East northeast wind around 5 mph becoming calm.
Thursday
Sunny, with a high near 90. Calm wind becoming southeast around 5 mph.
Thursday Night
Mostly clear, with a low around 62. East wind around 5 mph becoming calm.
Friday
Sunny, with a high near 90.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 63.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 63.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
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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:
12:31 am CDT Sep 15, 2025
Forecast Valid:
12am CDT Sep 15, 2025-6pm CDT Sep 21, 2025
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database Weather Element Forecast

Chance of Precipitation