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

64°F

18°C

Humidity 100%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 25 Jun 1:55 am CDT
Extended Forecast for

Portland TN

  • Overnight

    Overnight: Mostly cloudy, with a low around 64. Calm wind becoming south around 5 mph.

    Low: 64 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 87. South southwest wind around 5 mph.

    High: 87 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 69. South southwest wind around 5 mph becoming calm.

    Low: 69 °F

    Partly Cloudy

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 88. South southwest wind 5 to 10 mph.

    High: 88 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 74. South southwest wind 5 to 10 mph.

    Low: 74 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 88 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 73. West southwest wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 92. West southwest wind around 5 mph.

    High: 92 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 64. Calm wind becoming south around 5 mph.
Thursday
Sunny, with a high near 87. South southwest wind around 5 mph.
Thursday Night
Partly cloudy, with a low around 69. South southwest wind around 5 mph becoming calm.
Friday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 88. South southwest wind 5 to 10 mph.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 74. South southwest wind 5 to 10 mph.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Saturday Night
A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 73. West southwest wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 92. West southwest wind around 5 mph.
Sunday Night
Mostly clear, with a low around 74. Calm wind.
Monday
Sunny, with a high near 93.
Monday Night
Clear, with a low around 76.
Tuesday
Sunny, with a high near 93.
Tuesday Night
Mostly clear, with a low around 77.
Wednesday
Sunny, with a high near 93.
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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:
1:31 am CDT Jun 25, 2026
Forecast Valid:
2am CDT Jun 25, 2026-6pm CDT Jul 1, 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