Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 13°F | 31°F | 21°F | 2.9" |
February | 15°F | 33°F | 23°F | 2.6" |
March | 29°F | 49°F | 38°F | 4.2" |
April | 39°F | 62°F | 50°F | 6.5" |
May | 51°F | 74°F | 61°F | 6.2" |
June | 61°F | 82°F | 71°F | 7.9" |
July | 64°F | 84°F | 73°F | 6.6" |
August | 61°F | 82°F | 71°F | 9.8" |
September | 53°F | 76°F | 64°F | 6.2" |
October | 42°F | 64°F | 52°F | 6.1" |
November | 30°F | 50°F | 39°F | 4.3" |
December | 19°F | 34°F | 26°F | 4.0" |
Index | DeWitt | Iowa | National |
Air quality index | 42 | 39 | 42 |
Pollution index | 1,592,910 | 1,154,535 | 2,726,193 |
Measurement | Total |
Days measured | 364 |
Days with good air quality | 268 |
Days with moderate air quality | 96 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.090% |
Benzene | 0.030% |
Carbon Tetrachloride | 0.000% |
Lead | 0.010% |
Mercury | 0.010% |
City | Population | Air Quality Index | National Avg. |
Welton, IA | 150 | 42 | 16.0% |
McCausland, IA | 379 | 42 | 16.0% |
Charlotte, IA | 378 | 42 | 16.0% |
Camanche, IA | 4,342 | 42 | 16.0% |
Princeton, IA | 942 | 42 | 16.0% |
DeWitt, IA | 5,215 | 42 | 16.0% |
City | Population | Air Quality Index | National Avg. |
Deer Lake, NL | 5,214 | n/a | |
Ranson, WV | 5,217 | 38 | 24.0% |
McGregor, TX | 5,212 | 38 | 24.0% |
Brewton, AL | 5,210 | 41 | 18.0% |
Anthony, TX | 5,210 | 53 | 6.0% |
DeWitt, IA | 5,215 | 42 | 16.0% |