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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 54°F | 43°F | 4.1" |
| February | 35°F | 57°F | 45°F | 4.0" |
| March | 43°F | 67°F | 54°F | 4.2" |
| April | 51°F | 75°F | 63°F | 4.1" |
| May | 59°F | 82°F | 70°F | 3.8" |
| June | 67°F | 90°F | 78°F | 3.6" |
| July | 70°F | 91°F | 79°F | 3.9" |
| August | 70°F | 90°F | 79°F | 4.7" |
| September | 64°F | 84°F | 73°F | 4.6" |
| October | 51°F | 75°F | 62°F | 3.4" |
| November | 40°F | 65°F | 52°F | 3.5" |
| December | 38°F | 58°F | 47°F | 5.1" |
| Index | Dunwoody | 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. |
| Suwanee, GA | 20,444 | 37 | 26.0% |
| Marietta, GA | 60,687 | 52 | 4.0% |
| Atlanta, GA | 497,642 | 52 | 4.0% |
| Decatur, GA | 24,814 | 52 | 4.0% |
| Mableton, GA | 41,647 | 52 | 4.0% |
| Dunwoody, GA | 49,466 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Texas City, TX | 49,468 | 52 | 4.0% |
| Rimouski, QC | 49,516 | n/a | |
| Cerritos, CA | 49,388 | 72 | 44.0% |
| Azusa, CA | 49,584 | 72 | 44.0% |
| Wilson, NC | 49,310 | 36 | 28.0% |
| Dunwoody, GA | 49,466 | 52 | 4.0% |
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