TODAY MAR19
TEMPERATURE33
HUMIDITY51
PRESSURE102370
WIND COND.260 5.4
  • 6638Tue
  • 5434Wed
  • 4938Thu
  • 6137Fri20%20%
  • 5639Sat
daynightWeather update from St. Louis Downtown Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Granite City for July is 78.8 degrees
  • The lowest monthly average temperature in Granite City for January is 32.5 degrees
  • The most monthly precipitation in Granite City occurs in April with 5.3 inches
  • The air quality index in Granite City is 28% worse than the national average
  • The pollution index in Granite City is 211% worse than the national average

Compare Granite City, IL Weather

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      Granite City 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
      January24°F43°F32°F1.8"
      February26°F45°F34°F1.6"
      March37°F59°F47°F3.7"
      April47°F70°F58°F5.3"
      May56°F78°F67°F4.8"
      June65°F88°F76°F4.4"
      July68°F90°F79°F3.9"
      August66°F89°F77°F3.1"
      September58°F82°F69°F4.2"
      October47°F71°F58°F3.1"
      November36°F58°F46°F2.8"
      December29°F45°F36°F3.1"

      Granite City 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.
      IndexGranite CityIllinoisNational
      Air quality index544142
      Pollution index8,473,0503,148,6942,726,193

      Granite City air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality134
      Days with moderate air quality221
      Days w/ poor A.Q. for sensitive groups8
      Days with unhealthy air quality2

      Granite City air quality information

      PollutantTotal
      Arsenic0.020%
      Benzene0.070%
      Carbon Tetrachloride0.020%
      Lead0.010%
      Mercury0.010%

      Average monthly Granite City temperature with heat index

      Granite City monthly precipitation with daily maximum

      Granite City monthly snow depth with daily maximum

      Granite City monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Florissant, MO51,220548.0%
      East Alton, IL6,021548.0%
      Maryville, IL7,962548.0%
      South Roxana, IL2,304548.0%
      West Alton, MO451548.0%
      Granite City, IL28,563548.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Schererville, IN28,5595510.0%
      Northampton, MA28,5524020.0%
      Monterey, CA28,5753726.0%
      Burton, MI28,5983824.0%
      West Springfield Town, MA28,5274020.0%
      Granite City, IL28,563548.0%
      Source: The Granite City, 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.