| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 38°F | 60°F | 48°F | 6.6" |
| February | 40°F | 64°F | 50°F | 6.8" |
| March | 48°F | 72°F | 59°F | 10.3" |
| April | 55°F | 79°F | 66°F | 8.7" |
| May | 61°F | 84°F | 72°F | 6.8" |
| June | 69°F | 91°F | 78°F | 7.6" |
| July | 70°F | 91°F | 79°F | 6.7" |
| August | 71°F | 92°F | 79°F | 9.4" |
| September | 66°F | 88°F | 75°F | 8.4" |
| October | 55°F | 79°F | 65°F | 3.9" |
| November | 44°F | 69°F | 55°F | 4.1" |
| December | 42°F | 62°F | 51°F | 6.6" |
| Index | Laurel | Mississippi | National |
| Air quality index | 35 | 40 | 42 |
| Pollution index | 605,860 | 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 | 0.004% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Soso, MS | 474 | 35 | 30.0% |
| Ellisville, MS | 4,671 | 35 | 30.0% |
| Sandersville, MS | 663 | 35 | 30.0% |
| Sharon, MS | 1,810 | 35 | 30.0% |
| Heidelberg, MS | 912 | 36 | 28.0% |
| Laurel, MS | 18,403 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Hopkins, MN | 18,400 | 46 | 8.0% |
| Springboro, OH | 18,416 | 47 | 6.0% |
| St. John, IN | 18,382 | 55 | 10.0% |
| Niles, OH | 18,429 | 42 | 16.0% |
| Rutherford, NJ | 18,376 | 51 | 2.0% |
| Laurel, MS | 18,403 | 35 | 30.0% |
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