| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 33°F | 24°F | 2.8" |
| February | 20°F | 37°F | 27°F | 3.3" |
| March | 33°F | 55°F | 43°F | 3.3" |
| April | 42°F | 63°F | 51°F | 6.4" |
| May | 53°F | 74°F | 63°F | 7.9" |
| June | 63°F | 82°F | 72°F | 9.5" |
| July | 66°F | 87°F | 76°F | 3.7" |
| August | 67°F | 87°F | 76°F | 10.2" |
| September | 57°F | 79°F | 67°F | 7.1" |
| October | 46°F | 66°F | 55°F | 5.5" |
| November | 32°F | 52°F | 41°F | 3.2" |
| December | 18°F | 33°F | 25°F | 3.4" |
| Index | Powersville | Missouri | National |
| Air quality index | 39 | 97 | 42 |
| Pollution index | 141,634 | 1,630,255 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 306 |
| Days with moderate air quality | 59 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.004% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Clio, IA | 56 | 39 | 22.0% |
| Seymour, IA | 521 | 39 | 22.0% |
| Mercer, MO | 323 | 39 | 22.0% |
| Corydon, IA | 1,659 | 39 | 22.0% |
| Newtown, MO | 290 | 39 | 22.0% |
| Powersville, MO | 60 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Igiugig, AK | 60 | 31 | 38.0% |
| Whitestone, AK | 60 | 38 | 24.0% |
| Petrey, AL | 60 | 52 | 4.0% |
| Haswell, CO | 60 | 20 | 60.0% |
| Lake Harbor, FL | 60 | 36 | 28.0% |
| Powersville, MO | 60 | 39 | 22.0% |
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