| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 35°F | 24°F | 0.8" |
| February | 18°F | 37°F | 27°F | 1.3" |
| March | 32°F | 54°F | 41°F | 2.5" |
| April | 42°F | 65°F | 52°F | 4.9" |
| May | 52°F | 73°F | 62°F | 5.8" |
| June | 63°F | 83°F | 72°F | 6.1" |
| July | 66°F | 87°F | 76°F | 3.9" |
| August | 64°F | 84°F | 74°F | 6.4" |
| September | 56°F | 77°F | 66°F | 3.7" |
| October | 44°F | 65°F | 54°F | 3.3" |
| November | 33°F | 52°F | 41°F | 2.2" |
| December | 21°F | 38°F | 28°F | 2.0" |
| Index | New Hampton | Missouri | National |
| Air quality index | 43 | 97 | 42 |
| Pollution index | 1,056,450 | 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 | 0.030% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Ridgeway, MO | 483 | 43 | 14.0% |
| Albany, MO | 1,924 | 43 | 14.0% |
| Pattonsburg, MO | 286 | 43 | 14.0% |
| Bethany, MO | 3,135 | 43 | 14.0% |
| Worth, MO | 67 | 43 | 14.0% |
| New Hampton, MO | 295 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Colony, AL | 295 | 53 | 6.0% |
| Dyess, AR | 295 | 45 | 10.0% |
| Viola, AR | 295 | 36 | 28.0% |
| Canby, CA | 295 | 29 | 42.0% |
| Grenada, CA | 295 | 36 | 28.0% |
| New Hampton, MO | 295 | 43 | 14.0% |
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