Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 26°F | 41°F | 33°F | 9.0" |
February | 25°F | 43°F | 33°F | 4.8" |
March | 36°F | 60°F | 47°F | 3.9" |
April | 44°F | 68°F | 55°F | 4.3" |
May | 56°F | 80°F | 67°F | 4.3" |
June | 65°F | 87°F | 76°F | 5.8" |
July | 66°F | 89°F | 77°F | 3.9" |
August | 69°F | 91°F | 79°F | 4.6" |
September | 60°F | 85°F | 71°F | 4.9" |
October | 48°F | 71°F | 59°F | 3.7" |
November | 36°F | 58°F | 46°F | 7.6" |
December | 25°F | 40°F | 32°F | 2.5" |
Index | Otterville | Illinois | National |
Air quality index | 54 | 41 | 42 |
Pollution index | 8,870,230 | 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 | 0.180% |
Benzene | 0.060% |
Carbon Tetrachloride | 0.020% |
Lead | 0.030% |
Mercury | 0.120% |
City | Population | Air Quality Index | National Avg. |
Fieldon, IL | 153 | 54 | 8.0% |
Medora, IL | 323 | 54 | 8.0% |
Godfrey, IL | 17,540 | 54 | 8.0% |
Alton, IL | 26,490 | 54 | 8.0% |
Hardin, IL | 831 | 54 | 8.0% |
Otterville, IL | 195 | 54 | 8.0% |
City | Population | Air Quality Index | National Avg. |
Emerson, AR | 195 | 35 | 30.0% |
Menifee, AR | 195 | 45 | 10.0% |
Big Bend, CA | 195 | 42 | 16.0% |
Gold Hill, CO | 195 | 47 | 6.0% |
Woolsey, GA | 195 | 52 | 4.0% |
Otterville, IL | 195 | 54 | 8.0% |