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 94%
Wind Speed S 5 mph
Barometer 29.98 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 19 Aug 2:55 am CDT
Extended Forecast for

5 Miles NW Red Boiling Springs TN

  • Overnight

    Overnight: Patchy fog after 5am. Otherwise, clear, with a low around 65. Calm wind.

    Low: 65 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, increasing clouds, with a high near 91. Calm wind becoming south around 5 mph.

    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 70. Calm wind becoming west southwest around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 70 °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 noon. Partly sunny, with a high near 86. South wind around 5 mph becoming west northwest in the afternoon. Chance of precipitation is 60%.

    High: 86 °F

    Showers
    Likely then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 68. Calm wind. Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A slight chance of showers and thunderstorms between 1pm and 4pm, then a slight chance of showers after 4pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 86. Calm wind becoming north northwest around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 86 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Patchy fog before midnight, then patchy fog after 1am. Otherwise, mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Patchy Fog

  • Saturday

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

    High: 88 °F

    Areas Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog after 5am. Otherwise, clear, with a low around 65. Calm wind.
Wednesday
Patchy fog before 8am. Otherwise, increasing clouds, with a high near 91. Calm wind becoming south around 5 mph.
Wednesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 70. Calm wind becoming west southwest 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 noon. Partly sunny, with a high near 86. South wind around 5 mph becoming west northwest in the afternoon. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms. Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 68. Calm wind. Chance of precipitation is 30%.
Friday
A slight chance of showers and thunderstorms between 1pm and 4pm, then a slight chance of showers after 4pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 86. Calm wind becoming north northwest around 5 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
Patchy fog before midnight, then patchy fog after 1am. Otherwise, mostly clear, with a low around 66. Calm wind.
Saturday
Areas of fog before 8am. Otherwise, sunny, with a high near 88. Calm wind becoming west northwest around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 66. Calm wind.
Sunday
Sunny, with a high near 86.
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 65.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NW Red Boiling Springs TN
 36.59°N 85.92°W (Elev. 820 ft)
Last Update:
1:31 am CDT Aug 19, 2026
Forecast Valid:
3am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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