Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 21°F | 39°F | 29°F | 3.5" |
February | 23°F | 41°F | 31°F | 3.2" |
March | 36°F | 56°F | 44°F | 3.6" |
April | 46°F | 68°F | 56°F | 7.4" |
May | 56°F | 76°F | 65°F | 7.6" |
June | 64°F | 84°F | 74°F | 10.4" |
July | 67°F | 87°F | 76°F | 8.6" |
August | 65°F | 87°F | 75°F | 6.1" |
September | 58°F | 81°F | 68°F | 8.5" |
October | 46°F | 68°F | 56°F | 5.6" |
November | 36°F | 55°F | 45°F | 5.5" |
December | 27°F | 42°F | 33°F | 6.1" |
Index | Detroit | Illinois | National |
Air quality index | 41 | 41 | 42 |
Pollution index | 2,458,180 | 3,148,694 | 2,726,193 |
Measurement | Total |
Days measured | 241 |
Days with good air quality | 208 |
Days with moderate air quality | 33 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.002% |
Benzene | 0.020% |
Carbon Tetrachloride | 0.001% |
Lead | 0.120% |
Mercury | 0.330% |
City | Population | Air Quality Index | National Avg. |
Glasgow, IL | 93 | 40 | 20.0% |
Chapin, IL | 536 | 40 | 20.0% |
Winchester, IL | 1,717 | 40 | 20.0% |
Hillview, IL | 161 | 40 | 20.0% |
White Hall, IL | 2,356 | 40 | 20.0% |
Detroit, IL | 23 | 41 | 18.0% |
City | Population | Air Quality Index | National Avg. |
Ferry, AK | 23 | 38 | 24.0% |
Benton, AL | 23 | 52 | 4.0% |
Oak Hill, AL | 23 | 52 | 4.0% |
Coulterville, CA | 23 | 39 | 22.0% |
Parshall, CO | 23 | 47 | 6.0% |
Detroit, IL | 23 | 41 | 18.0% |