National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Portland Municipal Airport (K1M5)

Lat: 36.59°NLon: 86.48°WElev: 818ft.

A Few Clouds

95°F

35°C

Humidity 47%
Wind Speed SW 6 G 12 mph
Barometer 29.98 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 16 Aug 5:35 pm CDT
Extended Forecast for

5 Miles ENE Portland TN

Heat Advisory August 16, 07:00pm until August 17, 07:00pm
Extreme Heat Warning August 16, 05:43pm until August 16, 07:00pm
Click here for hazard details and duration
Heat Advisory
...
  •  
    Extreme Heat Warning August 16, 05:43pm until August 16, 07:00pm

    NOW until 7:00pm Sun

    Extreme Heat Warning

  • Tonight

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms, mainly between 1pm and 5pm. Mostly sunny, with a high near 92. Heat index values as high as 103. Light and variable wind becoming northwest 5 to 10 mph in the afternoon.

    High: 92 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 70. North northwest wind 5 to 10 mph becoming light in the evening. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 90 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69. North wind around 5 mph becoming calm.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 72. Northeast wind around 5 mph becoming southeast after midnight.

    Low: 72 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. West southwest wind around 5 mph becoming north northwest in the morning. Chance of precipitation is 60%.

    High: 88 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 75. West wind around 5 mph becoming calm in the evening.
Monday
A 40 percent chance of showers and thunderstorms, mainly between 1pm and 5pm. Mostly sunny, with a high near 92. Heat index values as high as 103. Light and variable wind becoming northwest 5 to 10 mph in the afternoon.
Monday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 70. North northwest wind 5 to 10 mph becoming light in the evening. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 90. Calm wind becoming north northwest around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 69. North wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 93. Calm wind becoming west southwest around 5 mph in the afternoon.
Wednesday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 72. Northeast wind around 5 mph becoming southeast after midnight.
Thursday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. West southwest wind around 5 mph becoming north northwest in the morning. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68. North northwest wind around 5 mph becoming calm in the evening.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Saturday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 87.
Saturday Night
A 20 percent chance of showers. Partly cloudy, with a low around 66.
Sunday
Sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles ENE Portland TN
 36.62°N 86.44°W (Elev. 820 ft)
Last Update:
1:31 pm CDT Aug 16, 2026
Forecast Valid:
5pm CDT Aug 16, 2026-6pm CDT Aug 23, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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