Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 18°F | 33°F | 25°F | 3.9" |
February | 18°F | 35°F | 26°F | 2.3" |
March | 31°F | 50°F | 39°F | 4.3" |
April | 40°F | 63°F | 50°F | 8.4" |
May | 51°F | 74°F | 62°F | 6.0" |
June | 61°F | 82°F | 71°F | 5.7" |
July | 63°F | 84°F | 73°F | 9.0" |
August | 62°F | 82°F | 71°F | 5.4" |
September | 54°F | 77°F | 65°F | 3.7" |
October | 44°F | 65°F | 53°F | 7.1" |
November | 33°F | 51°F | 41°F | 4.0" |
December | 22°F | 37°F | 29°F | 3.0" |
Index | Diamond | Illinois | National |
Air quality index | 0 | 41 | 42 |
Pollution index | 1,736,930 | 3,148,694 | 2,726,193 |
Measurement | Total |
Days measured | 335 |
Days with good air quality | 334 |
Days with moderate air quality | 1 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.004% |
Benzene | 0.040% |
Carbon Tetrachloride | 0.000% |
Lead | 0.001% |
Mercury | 0.001% |
City | Population | Air Quality Index | National Avg. |
Carbon Hill, IL | 386 | 0 | 100.0% |
Gardner, IL | 1,429 | 0 | 100.0% |
South Wilmington, IL | 702 | 0 | 100.0% |
Wilmington, IL | 5,883 | 0 | 100.0% |
Channahon, IL | 13,281 | 0 | 100.0% |
Diamond, IL | 2,786 | 0 | 100.0% |
City | Population | Air Quality Index | National Avg. |
Snowmass Village, CO | 2,786 | 44 | 12.0% |
Fairview, PA | 2,786 | 36 | 28.0% |
Canadian, TX | 2,786 | 44 | 12.0% |
Bar Nunn, WY | 2,786 | 42 | 16.0% |
Grand Forks AFB, ND | 2,785 | 33 | 34.0% |
Diamond, IL | 2,786 | 0 | 100.0% |