| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 54°F | 43°F | 8.0" |
| February | 35°F | 57°F | 45°F | 6.6" |
| March | 44°F | 67°F | 55°F | 6.9" |
| April | 51°F | 75°F | 63°F | 8.0" |
| May | 59°F | 81°F | 70°F | 8.0" |
| June | 68°F | 88°F | 78°F | 7.0" |
| July | 70°F | 89°F | 79°F | 8.2" |
| August | 70°F | 89°F | 79°F | 7.2" |
| September | 64°F | 83°F | 73°F | 9.0" |
| October | 52°F | 74°F | 62°F | 9.1" |
| November | 41°F | 64°F | 52°F | 8.1" |
| December | 38°F | 57°F | 47°F | 9.2" |
| Index | Smyrna | 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. |
| Hiram, GA | 4,021 | 52 | 4.0% |
| Marietta, GA | 60,687 | 52 | 4.0% |
| Avondale Estates, GA | 3,142 | 52 | 4.0% |
| Doraville, GA | 10,244 | 52 | 4.0% |
| Gresham Park, GA | 9,148 | 52 | 4.0% |
| Smyrna, GA | 56,333 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Euless, TX | 56,334 | 51 | 2.0% |
| Valdosta, GA | 56,320 | 35 | 30.0% |
| Fountain Valley, CA | 56,118 | 72 | 44.0% |
| Tinley Park, IL | 56,082 | 55 | 10.0% |
| Grand Forks, ND | 56,588 | 33 | 34.0% |
| Smyrna, GA | 56,333 | 52 | 4.0% |
Here are the best places to live in Georgia
Most Dangerous States In The US
See the best places to live in Smyrna
Check out the 10 most dangerous cities in Georgia