| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 38°F | 57°F | 46°F | 5.1" |
| February | 39°F | 60°F | 48°F | 6.9" |
| March | 47°F | 69°F | 57°F | 6.6" |
| April | 55°F | 76°F | 65°F | 6.1" |
| May | 62°F | 82°F | 71°F | 4.9" |
| June | 69°F | 89°F | 78°F | 5.9" |
| July | 71°F | 90°F | 79°F | 5.1" |
| August | 71°F | 90°F | 79°F | 5.3" |
| September | 66°F | 85°F | 74°F | 3.8" |
| October | 55°F | 76°F | 65°F | 3.4" |
| November | 46°F | 66°F | 55°F | 4.5" |
| December | 42°F | 60°F | 50°F | 6.8" |
| Index | Opelika | Alabama | National |
| Air quality index | 42 | 37 | 42 |
| Pollution index | 1,170,060 | 3,012,339 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 257 |
| Days with moderate air quality | 108 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.002% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Lanett, AL | 6,220 | 42 | 16.0% |
| West Point, GA | 3,871 | 42 | 16.0% |
| Loachapoka, AL | 192 | 42 | 16.0% |
| Auburn, AL | 65,508 | 42 | 16.0% |
| Cusseta, AL | 98 | 42 | 16.0% |
| Opelika, AL | 30,589 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Fleming Island, FL | 30,582 | 43 | 14.0% |
| Eldersburg, MD | 30,550 | 46 | 8.0% |
| Nicholasville, KY | 30,549 | 42 | 16.0% |
| Bel Air North, MD | 30,639 | 46 | 8.0% |
| Gurnee, IL | 30,519 | 39 | 22.0% |
| Opelika, AL | 30,589 | 42 | 16.0% |
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