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 83%
Wind Speed SW 9 mph
Barometer 29.97 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 18 Nov 11:15 pm CST
Extended Forecast for

4 Miles E Portland TN

  • Tonight

    Tonight: Showers and thunderstorms likely before 3am, then a slight chance of showers between 3am and 4am. Mostly cloudy, with a low around 60. Southwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 69. Calm wind becoming northwest around 5 mph.

    High: 69 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Patchy Fog

  • Thursday

    Thursday: Showers, mainly after 11am. Patchy fog before 9am. High near 65. Calm wind becoming southeast around 5 mph. Chance of precipitation is 90%.

    High: 65 °F

    Chance
    Showers and
    Patchy Fog
    then Showers

  • Thursday Night

    Thursday Night: Showers, with thunderstorms also possible after midnight. Low around 58. East southeast wind around 5 mph becoming south southwest after midnight. Chance of precipitation is 100%.

    Low: 58 °F

    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers likely before noon, then showers and possibly a thunderstorm between noon and 3pm, then showers after 3pm. High near 70. South southwest wind 5 to 10 mph. Chance of precipitation is 80%.

    High: 70 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 58. South southwest wind around 5 mph. Chance of precipitation is 90%.

    Low: 58 °F

    Showers

  • Saturday

    Saturday: A 40 percent chance of showers, mainly before noon. Partly sunny, with a high near 67. West wind 5 to 10 mph.

    High: 67 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 48. Northwest wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms likely before 3am, then a slight chance of showers between 3am and 4am. Mostly cloudy, with a low around 60. Southwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Mostly cloudy, with a high near 69. Calm wind becoming northwest around 5 mph.
Wednesday Night
Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 51. Calm wind.
Thursday
Showers, mainly after 11am. Patchy fog before 9am. High near 65. Calm wind becoming southeast around 5 mph. Chance of precipitation is 90%.
Thursday Night
Showers, with thunderstorms also possible after midnight. Low around 58. East southeast wind around 5 mph becoming south southwest after midnight. Chance of precipitation is 100%.
Friday
Showers likely before noon, then showers and possibly a thunderstorm between noon and 3pm, then showers after 3pm. High near 70. South southwest wind 5 to 10 mph. Chance of precipitation is 80%.
Friday Night
Showers and possibly a thunderstorm. Low around 58. South southwest wind around 5 mph. Chance of precipitation is 90%.
Saturday
A 40 percent chance of showers, mainly before noon. Partly sunny, with a high near 67. West wind 5 to 10 mph.
Saturday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 48. Northwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 64.
Sunday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 45.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 63.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 49.
Tuesday
A 50 percent chance of showers. Mostly cloudy, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Portland TN
 36.58°N 86.45°W (Elev. 801 ft)
Last Update:
11:31 pm CST Nov 18, 2025
Forecast Valid:
11pm CST Nov 18, 2025-6pm CST Nov 25, 2025
 
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