| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 37°F | 55°F | 45°F | 5.4" |
| February | 37°F | 57°F | 46°F | 3.6" |
| March | 46°F | 69°F | 56°F | 3.3" |
| April | 54°F | 76°F | 65°F | 4.4" |
| May | 63°F | 83°F | 72°F | 4.7" |
| June | 70°F | 92°F | 80°F | 2.0" |
| July | 72°F | 92°F | 81°F | 4.3" |
| August | 72°F | 94°F | 82°F | 3.2" |
| September | 66°F | 87°F | 75°F | 8.2" |
| October | 53°F | 77°F | 64°F | 6.2" |
| November | 44°F | 67°F | 54°F | 2.5" |
| December | 38°F | 57°F | 46°F | 6.3" |
| Index | Inverness | Mississippi | National |
| Air quality index | 43 | 40 | 42 |
| Pollution index | 582,214 | 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 | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.004% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Mississippi Valley State University, MS | 1,059 | 43 | 14.0% |
| Belzoni, MS | 2,196 | 43 | 14.0% |
| Moorhead, MS | 1,549 | 43 | 14.0% |
| Indianola, MS | 9,550 | 43 | 14.0% |
| Morgan City, MS | 273 | 43 | 14.0% |
| Inverness, MS | 863 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Lakeville, CT | 863 | 37 | 26.0% |
| Burlingame, KS | 863 | 41 | 18.0% |
| Oil City, LA | 863 | 39 | 22.0% |
| Ripley, NY | 863 | 36 | 28.0% |
| Niota, TN | 863 | 30 | 40.0% |
| Inverness, MS | 863 | 43 | 14.0% |