TODAY MAR01
TEMPERATURE38
HUMIDITY79
PRESSURE30.15
WIND COND.320 22.3
  • 5027Mon
  • 5233Tue
  • 6134Wed
  • 5733Thu
  • 5434Fri
daynightWeather update from Southern Illinois Airport at

Key findings

  • The highest monthly average temperature in Grand Tower for August is 80 degrees
  • The lowest monthly average temperature in Grand Tower for February is 36 degrees
  • The most monthly precipitation in Grand Tower occurs in November with 11.1 inches
  • The air quality index in Grand Tower is 14% better than the national average
  • The pollution index in Grand Tower is 54% 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 index434150
      Pollution index2,331,2203,347,2955,066,862

      Grand Tower air quality information

      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

      Grand Tower air quality information

      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

      City, StatePopulationAir Quality IndexNational Avg.
      Rockwood, IL314314%
      Frohna, MO2234314%
      Murphysboro, IL8,0074314%
      Longtown, MO1414314%
      Gorham, IL1374314%
      Grand Tower, IL4574314%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Floodwood, MN4573530%
      Goldfield, NV457476%
      Hammond, IL4574412%
      Rankin, IL4574216%
      Standish, ME4574020%
      Grand Tower, IL4574314%
      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.