Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 28°F | 43°F | 35°F | 11.3" |
February | 26°F | 43°F | 33°F | 3.1" |
March | 39°F | 61°F | 49°F | 5.3" |
April | 45°F | 68°F | 56°F | 5.9" |
May | 56°F | 80°F | 68°F | 4.4" |
June | 65°F | 88°F | 76°F | 4.0" |
July | 67°F | 88°F | 77°F | 9.1" |
August | 69°F | 91°F | 79°F | 7.4" |
September | 60°F | 84°F | 71°F | 8.8" |
October | 48°F | 72°F | 59°F | 4.0" |
November | 37°F | 59°F | 47°F | 8.5" |
December | 27°F | 42°F | 34°F | 3.1" |
Index | Columbia | Illinois | National |
Air quality index | 54 | 41 | 42 |
Pollution index | 6,055,640 | 3,148,694 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 134 |
Days with moderate air quality | 221 |
Days w/ poor A.Q. for sensitive groups | 8 |
Days with unhealthy air quality | 2 |
Pollutant | Total |
Arsenic | 0.010% |
Benzene | 0.070% |
Carbon Tetrachloride | 0.040% |
Lead | 0.100% |
Mercury | 0.230% |
City | Population | Air Quality Index | National Avg. |
Caseyville, IL | 4,203 | 54 | 8.0% |
Clayton, MO | 16,763 | 54 | 8.0% |
Fenton, MO | 4,033 | 54 | 8.0% |
Lakeshire, MO | 1,435 | 54 | 8.0% |
Richmond Heights, MO | 8,581 | 54 | 8.0% |
Columbia, IL | 10,692 | 54 | 8.0% |
City | Population | Air Quality Index | National Avg. |
Sainte-Agathe-des-Monts, QC | 10,693 | n/a | |
Woodbury, NY | 10,700 | 36 | 28.0% |
Memphis, FL | 10,702 | 38 | 24.0% |
Pleasanton, TX | 10,703 | 49 | 2.0% |
Cold Springs, NV | 10,704 | 46 | 8.0% |
Columbia, IL | 10,692 | 54 | 8.0% |