Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 17°F | 32°F | 24°F | 3.1" |
February | 18°F | 34°F | 26°F | 3.0" |
March | 31°F | 49°F | 39°F | 5.2" |
April | 40°F | 62°F | 50°F | 4.8" |
May | 51°F | 73°F | 61°F | 5.9" |
June | 60°F | 82°F | 70°F | 6.7" |
July | 64°F | 84°F | 73°F | 4.1" |
August | 62°F | 82°F | 71°F | 7.7" |
September | 55°F | 76°F | 65°F | 3.2" |
October | 44°F | 64°F | 53°F | 7.3" |
November | 33°F | 50°F | 41°F | 3.9" |
December | 22°F | 36°F | 29°F | 3.7" |
Index | Orland Hills | Illinois | National |
Air quality index | 55 | 41 | 42 |
Pollution index | 1,558,070 | 3,148,694 | 2,726,193 |
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 | 0.010% |
Carbon Tetrachloride | 0.070% |
Lead | 0.090% |
Mercury | 0.010% |
City | Population | Air Quality Index | National Avg. |
Elwood, IL | 2,524 | 0 | 100.0% |
Crest Hill, IL | 20,388 | 55 | 10.0% |
Hinsdale, IL | 17,366 | 55 | 10.0% |
Darien, IL | 21,843 | 55 | 10.0% |
Ingalls Park, IL | 3,022 | 55 | 10.0% |
Orland Hills, IL | 7,069 | 55 | 10.0% |
City | Population | Air Quality Index | National Avg. |
Baie-Saint-Paul, QC | 7,069 | n/a | |
Hudson Falls, NY | 7,067 | 35 | 30.0% |
Saint-Apollinaire, QC | 7,067 | n/a | |
Delphos, OH | 7,066 | 39 | 22.0% |
Cos Cob, CT | 7,065 | 43 | 14.0% |
Orland Hills, IL | 7,069 | 55 | 10.0% |