| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 6°F | 24°F | 15°F | 1.9" |
| February | 3°F | 25°F | 14°F | 2.5" |
| March | 19°F | 41°F | 29°F | 1.9" |
| April | 31°F | 56°F | 43°F | 3.9" |
| May | 42°F | 67°F | 55°F | 4.9" |
| June | 54°F | 78°F | 66°F | 4.9" |
| July | 58°F | 81°F | 70°F | 8.9" |
| August | 56°F | 78°F | 67°F | 8.7" |
| September | 50°F | 73°F | 61°F | 5.1" |
| October | 36°F | 58°F | 47°F | 3.9" |
| November | 24°F | 43°F | 32°F | 3.8" |
| December | 12°F | 27°F | 20°F | 1.4" |
| Index | Motley | Minnesota | National |
| Air quality index | 29 | 35 | 42 |
| Pollution index | 3,117,800 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 359 |
| Days with good air quality | 328 |
| Days with moderate air quality | 29 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Fort Ripley, MN | 79 | 29 | 42.0% |
| Staples, MN | 2,613 | 29 | 42.0% |
| Lake Shore, MN | 968 | 29 | 42.0% |
| Clarissa, MN | 637 | 29 | 42.0% |
| Pillager, MN | 382 | 29 | 42.0% |
| Motley, MN | 570 | 29 | 42.0% |
| City | Population | Air Quality Index | National Avg. |
| New Stuyahok, AK | 570 | 31 | 38.0% |
| Our Town, AL | 570 | 52 | 4.0% |
| Alford, FL | 570 | 35 | 30.0% |
| Charter Oak, IA | 570 | 35 | 30.0% |
| Roberts, ID | 570 | 27 | 46.0% |
| Motley, MN | 570 | 29 | 42.0% |
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