| 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. |
| Ball Ground, GA | 1,831 | 37 | 26.0% |
| Nelson, GA | 1,470 | 37 | 26.0% |
| Fairmount, GA | 928 | 43 | 14.0% |
| Emerson, GA | 1,649 | 44 | 12.0% |
| White, GA | 680 | 44 | 12.0% |
| Canton, GA | 25,022 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Mint Hill, NC | 25,024 | 49 | 2.0% |
| Ardmore, OK | 25,027 | 43 | 14.0% |
| Junction City, KS | 25,016 | 32 | 36.0% |
| Hercules, CA | 25,011 | 40 | 20.0% |
| Starkville, MS | 25,011 | 39 | 22.0% |
| Canton, GA | 25,022 | 52 | 4.0% |
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