TODAY MAY20
TEMPERATURE71
HUMIDITY84
PRESSURE30.15
WIND COND.310 3.4
  • 8465Mon30%30%
  • 8666Tue
  • 8768Wed
  • 8869Thu20%
  • 8870Fri30%
daynightWeather update from St. Louis Downtown Airport at

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

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Compare Granite City, IL Weather To Other Cities

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

Granite City 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

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

City, StatePopulationAir Quality IndexNational Avg.
Alton, IL27,1756020%
Cahokia, IL14,5746020%
Dupo, IL3,9666020%
Edwardsville, IL25,0446020%
Hartford, IL1,5696020%
Granite City, IL29,6626020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Niles, IL29,6286020%
Bay Shore, NY29,704476%
Sterling, VA29,597492%
San Carlos, CA29,596484%
Prairieville, LA29,732468%
Granite City, IL29,6626020%
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.