| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 63°F | 48°F | 4.7" |
| February | 38°F | 66°F | 51°F | 5.4" |
| March | 45°F | 74°F | 59°F | 5.4" |
| April | 52°F | 81°F | 66°F | 4.4" |
| May | 60°F | 86°F | 73°F | 4.5" |
| June | 69°F | 93°F | 80°F | 3.8" |
| July | 72°F | 94°F | 81°F | 4.9" |
| August | 72°F | 95°F | 81°F | 4.6" |
| September | 66°F | 91°F | 77°F | 3.3" |
| October | 53°F | 82°F | 66°F | 3.2" |
| November | 41°F | 72°F | 56°F | 3.1" |
| December | 39°F | 65°F | 51°F | 5.8" |
| Index | Selma | Alabama | National |
| Air quality index | 52 | 37 | 42 |
| Pollution index | 726,907 | 3,012,339 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 171 |
| Days with moderate air quality | 193 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.020% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Orrville, AL | 145 | 52 | 4.0% |
| Selmont-West Selmont, AL | 1,855 | 52 | 4.0% |
| Valley Grande, AL | 3,627 | 52 | 4.0% |
| Benton, AL | 23 | 52 | 4.0% |
| Selma, AL | 17,762 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Miramichi, NB | 17,761 | n/a | |
| Ocean Springs, MS | 17,756 | 42 | 16.0% |
| Port Hope, ON | 17,769 | n/a | |
| Lackawanna, NY | 17,751 | 39 | 22.0% |
| Maitland, FL | 17,749 | 39 | 22.0% |
| Selma, AL | 17,762 | 52 | 4.0% |
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