| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 58°F | 44°F | 4.0" |
| February | 33°F | 59°F | 45°F | 8.1" |
| March | 40°F | 69°F | 53°F | 9.3" |
| April | 43°F | 72°F | 57°F | 4.8" |
| May | 51°F | 81°F | 66°F | 4.7" |
| June | 63°F | 87°F | 74°F | 5.5" |
| July | 68°F | 88°F | 76°F | 12.3" |
| August | 70°F | 91°F | 79°F | 7.5" |
| September | 62°F | 86°F | 73°F | 1.3" |
| October | 51°F | 76°F | 62°F | 2.2" |
| November | 39°F | 67°F | 51°F | 4.6" |
| December | 33°F | 58°F | 45°F | 6.9" |
| Index | Chattahoochee Hills | Georgia | National |
| Air quality index | 52 | 41 | 42 |
| Pollution index | 531,544 | 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 | 0.020% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.060% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Douglasville, GA | 33,035 | 52 | 4.0% |
| Newnan, GA | 40,227 | 52 | 4.0% |
| Whitesburg, GA | 580 | 52 | 4.0% |
| Villa Rica, GA | 15,803 | 52 | 4.0% |
| Palmetto, GA | 4,802 | 52 | 4.0% |
| Chattahoochee Hills, GA | 2,780 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Lena, IL | 2,780 | 42 | 16.0% |
| Crosby, MN | 2,780 | 29 | 42.0% |
| Mount Vernon, TX | 2,780 | 37 | 26.0% |
| Chimayo, NM | 2,779 | 41 | 18.0% |
| Botwood, NL | 2,779 | n/a | |
| Chattahoochee Hills, GA | 2,780 | 52 | 4.0% |
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