Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 20°F | 38°F | 29°F | 2.1" |
February | 22°F | 41°F | 31°F | 1.9" |
March | 34°F | 56°F | 44°F | 2.9" |
April | 44°F | 68°F | 56°F | 4.3" |
May | 54°F | 77°F | 65°F | 4.5" |
June | 64°F | 86°F | 74°F | 5.5" |
July | 66°F | 88°F | 77°F | 4.3" |
August | 64°F | 86°F | 75°F | 3.2" |
September | 57°F | 81°F | 68°F | 3.7" |
October | 46°F | 69°F | 56°F | 3.7" |
November | 36°F | 55°F | 45°F | 2.5" |
December | 26°F | 41°F | 33°F | 2.8" |
Index | Williamsville | Illinois | National |
Air quality index | 40 | 41 | 42 |
Pollution index | 1,277,890 | 3,148,694 | 2,726,193 |
Measurement | Total |
Days measured | 360 |
Days with good air quality | 287 |
Days with moderate air quality | 73 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.010% |
Benzene | 0.050% |
Carbon Tetrachloride | 0.000% |
Lead | 0.010% |
Mercury | 0.002% |
City | Population | Air Quality Index | National Avg. |
Springfield, IL | 115,075 | 40 | 20.0% |
Cantrall, IL | 104 | 40 | 20.0% |
Jerome, IL | 1,973 | 40 | 20.0% |
Southern View, IL | 1,605 | 40 | 20.0% |
Buffalo, IL | 345 | 40 | 20.0% |
Williamsville, IL | 1,468 | 40 | 20.0% |
City | Population | Air Quality Index | National Avg. |
Bunker Hill, IL | 1,468 | 54 | 8.0% |
Clarkson, KY | 1,468 | 39 | 22.0% |
Leavittsburg, OH | 1,468 | 42 | 16.0% |
Stratford, OK | 1,468 | 36 | 28.0% |
University of Pittsburgh Johnstown, PA | 1,468 | 39 | 22.0% |
Williamsville, IL | 1,468 | 40 | 20.0% |