Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 23°F | 40°F | 31°F | 5.3" |
February | 24°F | 43°F | 33°F | 3.4" |
March | 36°F | 57°F | 45°F | 4.0" |
April | 46°F | 69°F | 56°F | 7.6" |
May | 56°F | 77°F | 66°F | 6.3" |
June | 64°F | 86°F | 75°F | 6.7" |
July | 66°F | 87°F | 76°F | 5.7" |
August | 63°F | 86°F | 74°F | 4.9" |
September | 56°F | 82°F | 67°F | 5.9" |
October | 46°F | 70°F | 57°F | 5.6" |
November | 35°F | 56°F | 44°F | 5.6" |
December | 28°F | 44°F | 35°F | 4.9" |
Index | Flat Rock | Illinois | National |
Air quality index | 36 | 41 | 50 |
Pollution index | 500,004 | 3,347,295 | 5,066,862 |
Measurement | Total |
Days measured | 359 |
Days with good air quality | 328 |
Days with moderate air quality | 31 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.001% |
Benzene | 0.020% |
Carbon Tetrachloride | 0.000% |
Lead | 0.000% |
Mercury | 0.000% |
City, State | Population | Air Quality Index | National Avg. |
Oaktown, IN | 690 | 36 | 28% |
Robinson, IL | 7,447 | 36 | 28% |
Lawrenceville, IL | 4,464 | 36 | 28% |
Emison, IN | 127 | 36 | 28% |
Stoy, IL | 130 | 36 | 28% |
Flat Rock, IL | 329 | 36 | 28% |
City, State | Population | Air Quality Index | National Avg. |
Custer City, OK | 329 | 43 | 14% |
Kanarraville, UT | 329 | 44 | 12% |
Lakeland Shores, MN | 329 | 46 | 8% |
Great Cacapon, WV | 329 | 40 | 20% |
Florence, SD | 329 | 25 | 50% |
Flat Rock, IL | 329 | 36 | 28% |