| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 56°F | 43°F | 4.8" |
| February | 34°F | 59°F | 45°F | 3.8" |
| March | 42°F | 69°F | 55°F | 5.0" |
| April | 50°F | 78°F | 63°F | 5.3" |
| May | 58°F | 84°F | 71°F | 4.9" |
| June | 68°F | 91°F | 79°F | 4.0" |
| July | 71°F | 93°F | 81°F | 5.1" |
| August | 71°F | 93°F | 81°F | 4.1" |
| September | 63°F | 88°F | 74°F | 4.5" |
| October | 50°F | 78°F | 63°F | 4.5" |
| November | 40°F | 67°F | 52°F | 4.1" |
| December | 35°F | 58°F | 46°F | 6.1" |
| Index | Water Valley | Mississippi | National |
| Air quality index | 33 | 40 | 42 |
| Pollution index | 916,444 | 1,514,109 | 2,726,193 |
| Measurement | Total |
| Days measured | 101 |
| Days with good air quality | 77 |
| Days with moderate air quality | 24 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Taylor, MS | 298 | 33 | 34.0% |
| University, MS | 3,749 | 33 | 34.0% |
| Coffeeville, MS | 1,013 | 33 | 34.0% |
| Oxford, MS | 27,662 | 33 | 34.0% |
| Water Valley, MS | 3,300 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Heron Bay, GA | 3,300 | 52 | 4.0% |
| Hartford, SD | 3,300 | 36 | 28.0% |
| Elma, WA | 3,299 | 20 | 60.0% |
| Pagedale, MO | 3,301 | 54 | 8.0% |
| Southampton, NY | 3,301 | 41 | 18.0% |
| Water Valley, MS | 3,300 | 33 | 34.0% |
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