TODAY JUN23
TEMPERATURE81
HUMIDITY61
PRESSURE29.78
WIND COND.30 9.2
  • 9171Sun50%
  • 8973Mon50%40%
  • 9274Tue40%50%
  • 9476Wed30%
  • 9776Thu
daynightWeather update from St. Louis Downtown Airport at

Cahokia Average Weather

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
January4°F72°F36°F3.1"
February3°F74°F33°F1.3"
March10°F84°F47°F2.9"
April24°F92°F57°F2.4"
May35°F94°F66°F3.0"
June51°F99°F76°F2.0"
July56°F99°F78°F2.8"
August55°F105°F78°F1.3"
September38°F95°F69°F3.2"
October27°F93°F57°F1.5"
November16°F82°F46°F2.0"
December6°F65°F36°F1.2"

Did you know?

  • The highest monthly average temperature in Cahokia for July is 78 degrees.
  • The lowest monthly average temperature in Cahokia for February is 33 degrees.
  • The most monthly precipitation in Cahokia occurs in September with 3.2 inches.
  • The air quality index in Cahokia is 20% worse than the national average.
  • The pollution index in Cahokia is 67% worse than the national average.

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Compare Cahokia, IL Weather To Other Cities

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 index604150
Pollution index8,473,0503,347,2955,066,862

Cahokia air quality information

MeasurementTotal
Days measured365
Days with good air quality99
Days with moderate air quality231
Days w/ poor A.Q. for sensitive groups33
Days with unhealthy air quality2

Cahokia air quality information

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

City, StatePopulationAir Quality IndexNational Avg.
Oakland, MO1,6496020%
Pagedale, MO3,3066020%
Richmond Heights, MO8,4866020%
St. John, MO6,4596020%
Sunset Hills, MO8,5156020%
Cahokia, IL14,5746020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Greensburg, PA14,5725612%
Phillipsburg, NJ14,570476%
Deming, NM14,5824216%
Thibodaux, LA14,5653432%
Yankton, SD14,5854020%
Cahokia, IL14,5746020%
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.