| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 61°F | 47°F | 5.3" |
| February | 38°F | 64°F | 50°F | 5.9" |
| March | 45°F | 73°F | 58°F | 6.4" |
| April | 53°F | 80°F | 66°F | 5.8" |
| May | 60°F | 85°F | 72°F | 4.5" |
| June | 69°F | 92°F | 80°F | 4.0" |
| July | 71°F | 94°F | 81°F | 5.2" |
| August | 71°F | 94°F | 81°F | 4.9" |
| September | 65°F | 90°F | 76°F | 3.8" |
| October | 52°F | 81°F | 66°F | 3.3" |
| November | 43°F | 71°F | 55°F | 4.2" |
| December | 39°F | 63°F | 50°F | 6.0" |
| Index | Mendenhall | Mississippi | National |
| Air quality index | 44 | 40 | 42 |
| Pollution index | 689,827 | 1,514,109 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 256 |
| Days with moderate air quality | 109 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Mount Olive, MS | 1,776 | 35 | 30.0% |
| Florence, MS | 4,446 | 44 | 12.0% |
| Puckett, MS | 343 | 44 | 12.0% |
| Braxton, MS | 190 | 44 | 12.0% |
| Magee, MS | 4,174 | 44 | 12.0% |
| Mendenhall, MS | 3,003 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Shark River Hills, NJ | 3,003 | 51 | 2.0% |
| Yountville, CA | 3,001 | 35 | 30.0% |
| Epping, NH | 3,001 | 37 | 26.0% |
| Baltimore, OH | 3,005 | 46 | 8.0% |
| Tonkawa, OK | 3,000 | 40 | 20.0% |
| Mendenhall, MS | 3,003 | 44 | 12.0% |
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