| 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 | Newnan | 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. |
| Hogansville, GA | 3,165 | 42 | 16.0% |
| Lone Oak, GA | 77 | 42 | 16.0% |
| East Newnan, GA | 624 | 52 | 4.0% |
| Senoia, GA | 4,386 | 52 | 4.0% |
| Whitesburg, GA | 580 | 52 | 4.0% |
| Newnan, GA | 40,227 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Valrico, FL | 40,259 | 43 | 14.0% |
| Gallatin, TN | 40,262 | 45 | 10.0% |
| Holyoke, MA | 40,161 | 40 | 20.0% |
| Woburn, MA | 40,297 | 43 | 14.0% |
| Quincy, IL | 40,111 | 41 | 18.0% |
| Newnan, GA | 40,227 | 52 | 4.0% |
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