| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 54°F | 41°F | 4.5" |
| February | 33°F | 57°F | 44°F | 3.9" |
| March | 41°F | 67°F | 53°F | 4.6" |
| April | 48°F | 75°F | 61°F | 3.9" |
| May | 56°F | 82°F | 68°F | 4.0" |
| June | 64°F | 90°F | 76°F | 3.5" |
| July | 67°F | 90°F | 78°F | 4.2" |
| August | 67°F | 91°F | 78°F | 3.1" |
| September | 61°F | 85°F | 71°F | 3.9" |
| October | 49°F | 75°F | 60°F | 3.5" |
| November | 38°F | 65°F | 50°F | 3.5" |
| December | 36°F | 57°F | 45°F | 5.2" |
| Index | Canton | 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. |
| Nelson, GA | 1,302 | 37 | 26.0% |
| Ball Ground, GA | 2,230 | 37 | 26.0% |
| Fairmount, GA | 1,136 | 43 | 14.0% |
| Emerson, GA | 1,921 | 44 | 12.0% |
| White, GA | 923 | 44 | 12.0% |
| Canton, GA | 29,459 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Suisun City, CA | 29,459 | 35 | 30.0% |
| Seguin, TX | 29,458 | 49 | 2.0% |
| Austintown, OH | 29,467 | 42 | 16.0% |
| East Palo Alto, CA | 29,448 | 43 | 14.0% |
| Stockbridge, GA | 29,446 | 52 | 4.0% |
| Canton, GA | 29,459 | 52 | 4.0% |
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