TODAY NOV21
TEMPERATURE46
HUMIDITY40
PRESSURE101290
WIND COND.180 11.2
  • 4535Fri
  • 5337Sat
  • 5945Sun
  • 6346Mon70%
  • 5439Tue40%20%
daynightWeather update from Chattanooga, Lovell Field at
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Weather Quick Facts

  • The highest monthly average temperature in Signal Mountain for August is 79.7 degrees
  • The lowest monthly average temperature in Signal Mountain for January is 41.2 degrees
  • The most monthly precipitation in Signal Mountain occurs in December with 6.5 inches
  • The air quality index in Signal Mountain is 9% worse than the national average
  • The pollution index in Signal Mountain is 90% better than the national average

Compare Signal Mountain, TN Weather

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      Signal Mountain Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January31°F54°F41°F5.0"
      February32°F57°F44°F3.9"
      March41°F67°F53°F4.8"
      April49°F77°F62°F6.0"
      May57°F83°F69°F3.7"
      June66°F91°F78°F3.4"
      July70°F92°F80°F5.5"
      August70°F92°F80°F4.2"
      September63°F87°F73°F4.5"
      October50°F76°F62°F4.3"
      November38°F65°F51°F4.5"
      December35°F56°F45°F6.5"

      Signal Mountain air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexSignal MountainTennesseeNational
      Air quality index467642
      Pollution index271,3562,454,9162,726,193

      Signal Mountain air quality

      MeasurementTotal
      Days measured365
      Days with good air quality230
      Days with moderate air quality135
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.000%
      Benzene0.004%
      Carbon Tetrachloride0.001%
      Lead0.000%
      Mercury0.000%

      Average monthly Signal Mountain temperature with heat index

      Signal Mountain monthly precipitation with daily maximum

      Signal Mountain monthly snow depth with daily maximum

      Signal Mountain monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Fort Oglethorpe, GA9,877468.0%
      Rossville, GA3,989468.0%
      Falling Water, TN1,534468.0%
      Lookout Mountain, TN2,013468.0%
      Ridgeside, TN850468.0%
      Signal Mountain, TN8,574468.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Berthoud, CO8,574484.0%
      Mount Pleasant, IA8,5742942.0%
      Stony Brook University, NY8,5744314.0%
      Hailey, ID8,5752060.0%
      Otterburn Park, QC8,571n/a 
      Signal Mountain, TN8,574468.0%
      Source: The Signal Mountain, TN weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.