| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 40°F | 62°F | 50°F | 4.4" |
| February | 40°F | 64°F | 51°F | 5.6" |
| March | 47°F | 73°F | 59°F | 4.4" |
| April | 55°F | 79°F | 66°F | 6.3" |
| May | 63°F | 86°F | 74°F | 4.2" |
| June | 70°F | 93°F | 80°F | 2.7" |
| July | 72°F | 93°F | 81°F | 6.5" |
| August | 73°F | 93°F | 81°F | 3.6" |
| September | 68°F | 89°F | 77°F | 5.2" |
| October | 55°F | 79°F | 66°F | 5.2" |
| November | 44°F | 71°F | 56°F | 3.1" |
| December | 42°F | 64°F | 51°F | 8.7" |
| Index | Purvis | Mississippi | National |
| Air quality index | 35 | 40 | 42 |
| Pollution index | 2,346,240 | 1,514,109 | 2,726,193 |
| Measurement | Total |
| Days measured | 358 |
| Days with good air quality | 298 |
| Days with moderate air quality | 60 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Petal, MS | 10,624 | 35 | 30.0% |
| Lumberton, MS | 1,664 | 35 | 30.0% |
| West Hattiesburg, MS | 5,944 | 35 | 30.0% |
| Arnold Line, MS | 1,654 | 35 | 30.0% |
| Hattiesburg, MS | 46,010 | 35 | 30.0% |
| Purvis, MS | 2,198 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Beech Mountain Lakes, PA | 2,198 | 38 | 24.0% |
| Roseto, PA | 2,198 | 34 | 32.0% |
| New Market, VA | 2,198 | 36 | 28.0% |
| Danville, AR | 2,197 | 38 | 24.0% |
| Halstead, KS | 2,197 | 40 | 20.0% |
| Purvis, MS | 2,198 | 35 | 30.0% |
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