| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 56°F | 42°F | 4.9" |
| February | 32°F | 59°F | 44°F | 4.0" |
| March | 40°F | 68°F | 53°F | 5.2" |
| April | 47°F | 78°F | 62°F | 5.1" |
| May | 55°F | 84°F | 69°F | 4.2" |
| June | 65°F | 91°F | 77°F | 3.3" |
| July | 68°F | 92°F | 79°F | 3.6" |
| August | 68°F | 92°F | 79°F | 3.8" |
| September | 61°F | 87°F | 73°F | 3.5" |
| October | 48°F | 77°F | 61°F | 4.0" |
| November | 37°F | 66°F | 50°F | 3.8" |
| December | 34°F | 58°F | 45°F | 6.5" |
| Index | Henagar | Alabama | National |
| Air quality index | 39 | 37 | 42 |
| Pollution index | 1,068,210 | 3,012,339 | 2,726,193 |
| Measurement | Total |
| Days measured | 361 |
| Days with good air quality | 324 |
| Days with moderate air quality | 37 |
| 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 | 0.002% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Lookout Mountain, AL | 1,528 | 39 | 22.0% |
| Rainsville, AL | 5,038 | 39 | 22.0% |
| Dutton, AL | 506 | 39 | 22.0% |
| Section, AL | 998 | 39 | 22.0% |
| Fort Payne, AL | 14,063 | 39 | 22.0% |
| Henagar, AL | 2,457 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Arcanum, OH | 2,457 | 6 | 88.0% |
| New Palestine, IN | 2,456 | 54 | 8.0% |
| McConnelsville, OH | 2,456 | 25 | 50.0% |
| Kinsey, AL | 2,458 | 35 | 30.0% |
| Canton, MO | 2,455 | 41 | 18.0% |
| Henagar, AL | 2,457 | 39 | 22.0% |
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