| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 57°F | 44°F | 4.7" |
| February | 36°F | 60°F | 47°F | 4.5" |
| March | 44°F | 68°F | 55°F | 4.6" |
| April | 51°F | 76°F | 64°F | 4.6" |
| May | 60°F | 82°F | 71°F | 3.7" |
| June | 68°F | 89°F | 78°F | 4.3" |
| July | 71°F | 91°F | 80°F | 5.2" |
| August | 71°F | 90°F | 79°F | 5.3" |
| September | 65°F | 85°F | 74°F | 3.3" |
| October | 53°F | 76°F | 64°F | 3.4" |
| November | 42°F | 67°F | 54°F | 3.4" |
| December | 38°F | 59°F | 48°F | 6.2" |
| Index | Conley | Georgia | National |
| Air quality index | 52 | 41 | 42 |
| Pollution index | 19,982,200 | 1,874,972 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 162 |
| Days with moderate air quality | 184 |
| Days w/ poor A.Q. for sensitive groups | 18 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.210% |
| Benzene | 0.260% |
| Carbon Tetrachloride | 0.050% |
| Lead | 0.100% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Hapeville, GA | 6,576 | 52 | 4.0% |
| Irondale, GA | 8,107 | 52 | 4.0% |
| Atlanta, GA | 497,642 | 52 | 4.0% |
| Decatur, GA | 24,814 | 52 | 4.0% |
| Lake City, GA | 2,794 | 52 | 4.0% |
| Conley, GA | 6,645 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Strasburg, VA | 6,643 | 38 | 24.0% |
| Normandy Park, WA | 6,643 | 45 | 10.0% |
| Pikeville, KY | 6,642 | 42 | 16.0% |
| Cedarhurst, NY | 6,642 | 51 | 2.0% |
| Silsbee, TX | 6,642 | 45 | 10.0% |
| Conley, GA | 6,645 | 52 | 4.0% |
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