Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 16°F | 32°F | 24°F | 1.4" |
February | 17°F | 34°F | 25°F | 1.2" |
March | 30°F | 49°F | 38°F | 2.2" |
April | 39°F | 62°F | 50°F | 3.8" |
May | 49°F | 73°F | 60°F | 4.5" |
June | 59°F | 82°F | 70°F | 4.4" |
July | 63°F | 85°F | 74°F | 4.1" |
August | 62°F | 83°F | 72°F | 3.8" |
September | 54°F | 77°F | 65°F | 3.4" |
October | 43°F | 64°F | 53°F | 3.1" |
November | 32°F | 50°F | 40°F | 1.9" |
December | 21°F | 36°F | 29°F | 2.1" |
Index | Carol Stream | Illinois | National |
Air quality index | 55 | 41 | 50 |
Pollution index | 14,981,300 | 3,347,295 | 5,066,862 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 121 |
Days with moderate air quality | 227 |
Days w/ poor A.Q. for sensitive groups | 16 |
Days with unhealthy air quality | 1 |
Pollutant | Total |
Arsenic | 0.010% |
Benzene | 0.140% |
Carbon Tetrachloride | 0.030% |
Lead | 0.020% |
Mercury | 0.010% |
City, State | Population | Air Quality Index | National Avg. |
Prestbury, IL | 1,780 | 0 | 100% |
Montgomery, IL | 19,055 | 0 | 100% |
Gilberts, IL | 7,479 | 42 | 16% |
East Dundee, IL | 3,125 | 55 | 10% |
Sleepy Hollow, IL | 3,338 | 55 | 10% |
Carol Stream, IL | 40,228 | 55 | 10% |
City, State | Population | Air Quality Index | National Avg. |
Marana, AZ | 40,221 | 47 | 6% |
San Gabriel, CA | 40,200 | 72 | 44% |
Hickory, NC | 40,274 | 43 | 14% |
Holyoke, MA | 40,280 | 40 | 20% |
Hagerstown, MD | 40,325 | 40 | 20% |
Carol Stream, IL | 40,228 | 55 | 10% |