| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 55°F | 43°F | 12.0" |
| February | 36°F | 59°F | 47°F | 9.4" |
| March | 45°F | 69°F | 56°F | 9.0" |
| April | 52°F | 77°F | 64°F | 11.6" |
| May | 60°F | 83°F | 71°F | 8.6" |
| June | 68°F | 90°F | 79°F | 7.9" |
| July | 71°F | 92°F | 80°F | 7.8" |
| August | 71°F | 92°F | 80°F | 8.8" |
| September | 64°F | 87°F | 74°F | 8.5" |
| October | 51°F | 77°F | 63°F | 13.4" |
| November | 41°F | 66°F | 52°F | 8.1" |
| December | 37°F | 58°F | 47°F | 10.8" |
| Index | Vernon | Alabama | National |
| Air quality index | 35 | 37 | 42 |
| Pollution index | 604,536 | 3,012,339 | 2,726,193 |
| Measurement | Total |
| Days measured | 264 |
| Days with good air quality | 240 |
| Days with moderate air quality | 24 |
| 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 | 0.003% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Belk, AL | 344 | 35 | 30.0% |
| Kennedy, AL | 406 | 35 | 30.0% |
| Millport, AL | 1,209 | 35 | 30.0% |
| Gu-Win, AL | 143 | 35 | 30.0% |
| Gattman, MS | 121 | 39 | 22.0% |
| Vernon, AL | 2,204 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Spring Arbor, MI | 2,204 | 39 | 22.0% |
| Rock Hill, NY | 2,204 | 36 | 28.0% |
| Spencerville, OH | 2,204 | 39 | 22.0% |
| Topton, PA | 2,204 | 42 | 16.0% |
| Montgomery, TX | 2,204 | 52 | 4.0% |
| Vernon, AL | 2,204 | 35 | 30.0% |
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