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

91°F

33°C

Humidity 63%
Wind Speed W 5 mph
Barometer 29.98 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index104°F (40°C)
Last update 17 Aug 11:35 am CDT
Extended Forecast for

Cottontown TN

Heat Advisory August 17, 12:19pm until August 17, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 17, 12:19pm until August 17, 07:00pm

    NOW until 7:00pm Mon

    Heat Advisory

  • This Afternoon

    High: 92 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 67. North northwest wind 5 to 10 mph.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87. North northwest wind around 5 mph.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 67. North wind around 5 mph becoming calm.

    Low: 67 °F

    Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 91. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 91 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 70. South southwest wind around 5 mph becoming east after midnight. Chance of precipitation is 60%.

    Low: 70 °F

    Chance
    T-storms then
    Showers
    Likely

  • 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 86. East wind around 5 mph becoming west in the morning. Chance of precipitation is 70%.

    High: 86 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. North northeast wind around 5 mph.

    Low: 69 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms before 3pm. Sunny, with a high near 92. Heat index values as high as 105. Northwest wind around 10 mph.
Tonight
Mostly clear, with a low around 67. North northwest wind 5 to 10 mph.
Tuesday
Sunny, with a high near 87. North northwest wind around 5 mph.
Tuesday Night
Clear, with a low around 67. North wind around 5 mph becoming calm.
Wednesday
Mostly sunny, with a high near 91. Calm wind becoming south southeast around 5 mph in the afternoon.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 70. South southwest wind around 5 mph becoming east after midnight. Chance of precipitation is 60%.
Thursday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. East wind around 5 mph becoming west in the morning. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. North northeast wind around 5 mph.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. North northeast wind around 5 mph becoming west northwest in the afternoon. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 66.
Saturday
Sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 65.
Sunday
A 20 percent chance of showers. Sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cottontown TN
 36.49°N 86.59°W (Elev. 899 ft)
Last Update:
10:56 am CDT Aug 17, 2026
Forecast Valid:
12pm CDT Aug 17, 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