| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 39°F | 27°F | 0.6" |
| February | 20°F | 43°F | 30°F | 0.9" |
| March | 33°F | 58°F | 44°F | 2.0" |
| April | 43°F | 68°F | 54°F | 4.3" |
| May | 53°F | 77°F | 64°F | 4.6" |
| June | 64°F | 86°F | 75°F | 6.0" |
| July | 67°F | 89°F | 78°F | 4.0" |
| August | 64°F | 87°F | 75°F | 4.7" |
| September | 56°F | 81°F | 67°F | 3.5" |
| October | 44°F | 69°F | 55°F | 3.1" |
| November | 32°F | 56°F | 43°F | 1.5" |
| December | 21°F | 40°F | 30°F | 1.9" |
| Index | Clearmont | Missouri | National |
| Air quality index | 43 | 97 | 42 |
| Pollution index | 543,130 | 1,630,255 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 283 |
| Days with moderate air quality | 82 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Northboro, IA | 62 | 40 | 20.0% |
| Coin, IA | 198 | 40 | 20.0% |
| Maryville, MO | 11,641 | 43 | 14.0% |
| Hopkins, MO | 361 | 43 | 14.0% |
| College Springs, IA | 251 | 43 | 14.0% |
| Clearmont, MO | 161 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Flournoy, CA | 161 | 41 | 18.0% |
| Hasty, CO | 161 | 20 | 60.0% |
| Pilot Mound, IA | 161 | 37 | 26.0% |
| Rock Falls, IA | 161 | 15 | 70.0% |
| Westphalia, IA | 161 | 40 | 20.0% |
| Clearmont, MO | 161 | 43 | 14.0% |
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