| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 55°F | 43°F | 4.1" |
| February | 35°F | 59°F | 46°F | 4.2" |
| March | 43°F | 68°F | 55°F | 4.0" |
| April | 50°F | 76°F | 63°F | 4.2" |
| May | 58°F | 82°F | 70°F | 3.9" |
| June | 67°F | 90°F | 78°F | 3.2" |
| July | 70°F | 91°F | 79°F | 4.2" |
| August | 70°F | 90°F | 79°F | 4.0" |
| September | 63°F | 85°F | 73°F | 3.4" |
| October | 51°F | 75°F | 62°F | 3.3" |
| November | 40°F | 66°F | 52°F | 3.1" |
| December | 38°F | 59°F | 47°F | 5.1" |
| Index | Austell | Georgia | National |
| Air quality index | 52 | 41 | 42 |
| Pollution index | 14,162,500 | 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 | 0.220% |
| Benzene | 0.180% |
| Carbon Tetrachloride | 0.040% |
| Lead | 0.100% |
| Mercury | 0.040% |
| City | Population | Air Quality Index | National Avg. |
| East Point, GA | 35,031 | 52 | 4.0% |
| Powder Springs, GA | 15,390 | 52 | 4.0% |
| Atlanta, GA | 497,642 | 52 | 4.0% |
| Vinings, GA | 12,546 | 52 | 4.0% |
| Hapeville, GA | 6,576 | 52 | 4.0% |
| Austell, GA | 7,783 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Mantua, VA | 7,784 | 47 | 6.0% |
| Joshua Tree, CA | 7,786 | 89 | 78.0% |
| Navasota, TX | 7,786 | 52 | 4.0% |
| Butner, NC | 7,779 | 44 | 12.0% |
| Antigo, WI | 7,779 | 34 | 32.0% |
| Austell, GA | 7,783 | 52 | 4.0% |
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