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

Chattanooga, Lovell Field (KCHA)

Lat: 35.03°NLon: 85.2°WElev: 679ft.

Overcast

78°F

26°C

Humidity 76%
Wind Speed N 8 mph
Barometer 29.99 in (1014.9 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 21 May 6:53 pm EDT
Extended Forecast for

Signal Mountain TN

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 64 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: Showers and thunderstorms, mainly before 5pm, then showers and possibly a thunderstorm after 5pm. High near 74. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 74 °F

    Showers then
    T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms before 1am, then showers and possibly a thunderstorm, mainly after 1am. Low around 64. South wind around 5 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 64 °F

    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 76. South wind around 5 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 76 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. South wind around 5 mph becoming calm. Chance of precipitation is 60%.

    Low: 64 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 79. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 90%.

    High: 79 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 65. Calm wind. Chance of precipitation is 80%.

    Low: 65 °F

    Showers

  • Memorial Day

    Memorial Day: Showers, with thunderstorms also possible after 8am. High near 78. Chance of precipitation is 90%.

    High: 78 °F

    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 65. Chance of precipitation is 80%.

    Low: 65 °F

    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers and thunderstorms, mainly before 5pm, then showers and possibly a thunderstorm after 5pm. High near 74. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and thunderstorms before 1am, then showers and possibly a thunderstorm, mainly after 1am. Low around 64. South wind around 5 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
Showers and possibly a thunderstorm. High near 76. South wind around 5 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. South wind around 5 mph becoming calm. Chance of precipitation is 60%.
Sunday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 79. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 90%.
Sunday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 65. Calm wind. Chance of precipitation is 80%.
Memorial Day
Showers, with thunderstorms also possible after 8am. High near 78. Chance of precipitation is 90%.
Monday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 65. Chance of precipitation is 80%.
Tuesday
Showers likely, then showers and possibly a thunderstorm after 8am. High near 79. Chance of precipitation is 90%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 65. Chance of precipitation is 80%.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 80. Chance of precipitation is 70%.
Wednesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Signal Mountain TN
 35.15°N 85.35°W (Elev. 1709 ft)
Last Update:
7:06 pm EDT May 21, 2026
Forecast Valid:
7pm EDT May 21, 2026-6pm EDT May 28, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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