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

77°F

25°C

Humidity 83%
Wind Speed S 5 mph
Barometer 30.04 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 19 Aug 9:35 am CDT
Extended Forecast for

3 Miles W Portland TN

  • Today

    Today: Increasing clouds, with a high near 90. Calm wind becoming south around 5 mph in the afternoon.

    High: 90 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 71. South wind around 5 mph becoming west after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 71 °F

    Chance
    T-storms then
    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 9am, then a chance of showers and thunderstorms, mainly between 9am and 2pm. Partly sunny, with a high near 86. South southwest wind around 5 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 86 °F

    Showers
    Likely then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms. Patchy fog after midnight. Otherwise, partly cloudy, with a low around 69. North wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 69 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Friday

    Friday: Mostly sunny, with a high near 86. Calm wind becoming north around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 66. North wind around 5 mph becoming calm.

    Low: 66 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, sunny, with a high near 87. Light west wind becoming northwest 5 to 10 mph in the afternoon.

    High: 87 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 67. Northwest wind around 5 mph becoming calm in the evening.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 86. Light north northeast wind becoming north northwest 5 to 10 mph in the afternoon.

    High: 86 °F

    Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 90. Calm wind becoming south around 5 mph in the afternoon.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 71. South wind around 5 mph becoming west after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Showers likely and possibly a thunderstorm before 9am, then a chance of showers and thunderstorms, mainly between 9am and 2pm. Partly sunny, with a high near 86. South southwest wind around 5 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A slight chance of showers and thunderstorms. Patchy fog after midnight. Otherwise, partly cloudy, with a low around 69. North wind around 5 mph becoming calm. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 86. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 66. North wind around 5 mph becoming calm.
Saturday
Patchy fog before 8am. Otherwise, sunny, with a high near 87. Light west wind becoming northwest 5 to 10 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 67. Northwest wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 86. Light north northeast wind becoming north northwest 5 to 10 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 64.
Monday
A 20 percent chance of showers. Mostly sunny, with a high near 86.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 66.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 89.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Portland TN
 36.58°N 86.56°W (Elev. 791 ft)
Last Update:
1:31 am CDT Aug 19, 2026
Forecast Valid:
9am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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