Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 21°F | 34°F | 27°F | 4.6" |
February | 20°F | 32°F | 25°F | 1.8" |
March | 30°F | 49°F | 39°F | 2.6" |
April | 39°F | 60°F | 49°F | 4.5" |
May | 50°F | 72°F | 60°F | 3.5" |
June | 63°F | 84°F | 73°F | 3.8" |
July | 65°F | 84°F | 74°F | 5.4" |
August | 67°F | 83°F | 75°F | 12.8" |
September | 59°F | 80°F | 69°F | 6.7" |
October | 49°F | 66°F | 57°F | 1.7" |
November | 33°F | 50°F | 41°F | 2.4" |
December | 19°F | 32°F | 26°F | 1.7" |
Index | Wilmette | Illinois | National |
Air quality index | 55 | 41 | 42 |
Pollution index | 3,795,410 | 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 | 0.030% |
Benzene | 0.050% |
Carbon Tetrachloride | 0.010% |
Lead | 0.003% |
Mercury | 0.310% |
City | Population | Air Quality Index | National Avg. |
Lake Bluff, IL | 5,540 | 39 | 22.0% |
Mundelein, IL | 31,574 | 39 | 22.0% |
Libertyville, IL | 20,300 | 39 | 22.0% |
Knollwood, IL | 1,684 | 39 | 22.0% |
Long Grove, IL | 7,907 | 55 | 10.0% |
Wilmette, IL | 27,114 | 55 | 10.0% |
City | Population | Air Quality Index | National Avg. |
Statesville, NC | 27,114 | 40 | 20.0% |
Maywood, CA | 27,127 | 72 | 44.0% |
Plum, PA | 27,137 | 56 | 12.0% |
Allen Park, MI | 27,089 | 56 | 12.0% |
Lincoln, ON | 27,082 | n/a | |
Wilmette, IL | 27,114 | 55 | 10.0% |