TODAY NOV18
TEMPERATURE61
HUMIDITY87
PRESSURE101390
WIND COND.150 11.2
  • 715730%80%
  • 7043Tue
  • 5636Wed
  • 4932Thu
  • 4930Fri
daynightWeather update from Southern Illinois Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Grand Tower for August is 79.7 degrees
  • The lowest monthly average temperature in Grand Tower for February is 35.9 degrees
  • The most monthly precipitation in Grand Tower occurs in November with 11.1 inches
  • The air quality index in Grand Tower is 2% worse than the national average
  • The pollution index in Grand Tower is 14% better than the national average

Compare Grand Tower, IL Weather

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      Grand Tower 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
      January30°F44°F36°F7.5"
      February28°F46°F36°F4.9"
      March38°F61°F49°F4.2"
      April45°F67°F56°F5.8"
      May55°F79°F67°F4.4"
      June65°F87°F76°F5.4"
      July66°F87°F76°F3.6"
      August69°F92°F80°F3.8"
      September60°F85°F71°F5.0"
      October48°F73°F59°F5.5"
      November38°F59°F48°F11.1"
      December28°F45°F36°F6.7"

      Grand Tower 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.
      IndexGrand TowerIllinoisNational
      Air quality index434142
      Pollution index2,331,2203,148,6942,726,193

      Grand Tower air quality

      MeasurementTotal
      Days measured344
      Days with good air quality269
      Days with moderate air quality74
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.010%
      Benzene0.030%
      Carbon Tetrachloride0.004%
      Lead0.002%
      Mercury0.260%

      Average monthly Grand Tower temperature with heat index

      Grand Tower monthly precipitation with daily maximum

      Grand Tower monthly snow depth with daily maximum

      Grand Tower monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Rockwood, IL254314.0%
      Frohna, MO3194314.0%
      Murphysboro, IL7,7274314.0%
      Longtown, MO1274314.0%
      Gorham, IL2634314.0%
      Grand Tower, IL5894314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Schall Circle, FL5893628.0%
      Albert City, IA5893530.0%
      Camden, IN5894216.0%
      River Bluff, KY589492.0%
      Mulliken, MI5893628.0%
      Grand Tower, IL5894314.0%
      Source: The Grand Tower, IL 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.