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

68°F

20°C

Humidity 100%
Wind Speed S 5 mph
Barometer 29.99 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 19 Aug 1:15 am CDT
Extended Forecast for

5 Miles E Portland TN

  • Overnight

    Overnight: Clear, with a low around 67. Calm wind.

    Low: 67 °F

    Clear

  • Wednesday

    Wednesday: Patchy fog before 7am. Otherwise, increasing clouds, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.

    High: 91 °F

    Patchy Fog
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 71. South wind around 5 mph. 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 87. South southwest wind around 5 mph becoming northwest in the afternoon. Chance of precipitation is 60%.

    High: 87 °F

    Showers
    Likely then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers. Patchy fog after midnight. Otherwise, partly cloudy, with a low around 69. North wind around 5 mph becoming calm. Chance of precipitation is 30%.

    Low: 69 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 87. Calm wind becoming north around 5 mph in the afternoon.

    High: 87 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Patchy fog after 11pm. Otherwise, mostly clear, with a low around 67. North wind around 5 mph becoming calm.

    Low: 67 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, sunny, with a high near 88. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 88 °F

    Patchy Fog
    then Sunny

  • Saturday Night

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

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 67. Calm wind.
Wednesday
Patchy fog before 7am. Otherwise, increasing clouds, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 71. South wind around 5 mph. 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 87. South southwest wind around 5 mph becoming northwest in the afternoon. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers. Patchy fog after midnight. Otherwise, partly cloudy, with a low around 69. North wind around 5 mph becoming calm. Chance of precipitation is 30%.
Friday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 87. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 67. North wind around 5 mph becoming calm.
Saturday
Patchy fog before 8am. Otherwise, sunny, with a high near 88. Calm wind becoming northwest around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 67. North northwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 87.
Sunday Night
Partly cloudy, with a low around 65.
Monday
A 20 percent chance of showers. Mostly sunny, with a high near 87.
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 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles E Portland TN
 36.58°N 86.42°W (Elev. 801 ft)
Last Update:
1:31 am CDT Aug 19, 2026
Forecast Valid:
1am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation