TODAY DEC17
TEMPERATURE33
HUMIDITY63
PRESSURE30.19
WIND COND.340 11.4
  • 4229Tue
  • 4437Wed
  • 4432Thu50%
  • 3625Fri
  • 3525Sat
daynightWeather update from Chicago / West Chicago, Dupage Airport at

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St. Charles 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
January20°F33°F26°F3.6"
February18°F32°F24°F3.0"
March30°F49°F39°F3.1"
April39°F62°F49°F5.2"
May49°F72°F60°F3.7"
June60°F83°F72°F4.9"
July62°F84°F73°F7.8"
August64°F84°F74°F8.3"
September56°F80°F68°F2.9"
October47°F67°F56°F4.3"
November32°F50°F40°F3.1"
December18°F32°F25°F2.2"

Did you know?

  • The highest monthly average temperature in St. Charles for August is 74 degrees.
  • The lowest monthly average temperature in St. Charles for February is 24 degrees.
  • The most monthly precipitation in St. Charles occurs in August with 8.3 inches.
  • The air quality index in St. Charles is 20% worse than the national average.
  • The pollution index in St. Charles is 195% worse than the national average.

Real Estate Listings In St. Charles

Compare St. Charles, IL Weather To Other Cities

St. Charles 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.
IndexSt. CharlesIllinoisNational
Air quality index604150
Pollution index14,981,3003,347,2955,066,862

St. Charles air quality information

MeasurementTotal
Days measured365
Days with good air quality72
Days with moderate air quality281
Days w/ poor A.Q. for sensitive groups11
Days with unhealthy air quality1

St. Charles air quality information

PollutantTotal
Arsenic0.010%
Benzene0.140%
Carbon Tetrachloride0.030%
Lead0.020%
Mercury0.010%

Average monthly St. Charles temperature with heat index

St. Charles monthly precipitation with daily maximum

St. Charles monthly snow depth with daily maximum

St. Charles monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Montgomery, IL19,055198%
Kaneville, IL421198%
Prestbury, IL1,780198%
Sugar Grove, IL9,288198%
Big Rock, IL1,139198%
St. Charles, IL32,7456020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Kearney, NE32,7091962%
Tooele, UT32,783476%
Rome, NY32,6733432%
Kennesaw, GA32,669524%
Eastpointe, MI32,648524%
St. Charles, IL32,7456020%
Source: The St. Charles, 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.