TODAY OCT10
TEMPERATURE70
HUMIDITY49
PRESSURE102240
WIND COND.
  • 8459Fri
  • 8861Sat
  • 7848Sun
  • 6342
  • 6239Tue
daynightWeather update from St. Louis Downtown Airport at
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Weather Quick Facts

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

Compare Cahokia, IL Weather

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      Cahokia 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"

      Cahokia 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.
      IndexCahokiaIllinoisNational
      Air quality index544142
      Pollution index8,473,0503,148,6942,726,193

      Cahokia air quality

      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

      Air quality details

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

      Average monthly Cahokia temperature with heat index

      Cahokia monthly precipitation with daily maximum

      Cahokia monthly snow depth with daily maximum

      Cahokia monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Bellefontaine Neighbors, MO10,441548.0%
      Millstadt, IL3,882548.0%
      Country Life Acres, MO52548.0%
      Green Park, MO2,626548.0%
      Mehlville, MO28,824548.0%
      Cahokia, IL14,035548.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Grand Falls-Windsor, NL14,032n/a 
      Lewisville, NC14,0304510.0%
      Miami Springs, FL14,0414118.0%
      Chicago Ridge, IL14,0285510.0%
      Dumas, TX14,0424412.0%
      Cahokia, IL14,035548.0%
      Source: The Cahokia, 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.