| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 56°F | 45°F | 5.0" |
| February | 37°F | 58°F | 47°F | 4.7" |
| March | 46°F | 70°F | 57°F | 3.6" |
| April | 53°F | 77°F | 64°F | 5.4" |
| May | 62°F | 84°F | 72°F | 6.0" |
| June | 69°F | 91°F | 80°F | 2.4" |
| July | 71°F | 92°F | 81°F | 4.3" |
| August | 72°F | 94°F | 81°F | 3.3" |
| September | 66°F | 87°F | 75°F | 8.7" |
| October | 52°F | 77°F | 63°F | 5.9" |
| November | 44°F | 69°F | 55°F | 3.1" |
| December | 37°F | 59°F | 47°F | 5.5" |
| Index | Moorhead | Mississippi | National |
| Air quality index | 43 | 40 | 42 |
| Pollution index | 1,165,390 | 1,514,109 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 270 |
| Days with moderate air quality | 94 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Isola, MS | 770 | 43 | 14.0% |
| Schlater, MS | 236 | 43 | 14.0% |
| Itta Bena, MS | 1,687 | 43 | 14.0% |
| Sunflower, MS | 1,068 | 43 | 14.0% |
| Indianola, MS | 9,258 | 43 | 14.0% |
| Moorhead, MS | 1,513 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Wilton, ME | 1,513 | 28 | 44.0% |
| White Pigeon, MI | 1,513 | 37 | 26.0% |
| Waverly, MN | 1,513 | 32 | 36.0% |
| Caledonia, MS | 1,513 | 39 | 22.0% |
| Englewood, TN | 1,513 | 30 | 40.0% |
| Moorhead, MS | 1,513 | 43 | 14.0% |
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