| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 30°F | 50°F | 39°F | 5.2" |
| February | 32°F | 53°F | 41°F | 4.8" |
| March | 41°F | 65°F | 51°F | 5.1" |
| April | 49°F | 75°F | 61°F | 6.6" |
| May | 57°F | 82°F | 69°F | 7.2" |
| June | 66°F | 91°F | 78°F | 4.1" |
| July | 69°F | 93°F | 80°F | 5.1" |
| August | 68°F | 93°F | 80°F | 5.5" |
| September | 61°F | 86°F | 72°F | 5.9" |
| October | 49°F | 75°F | 60°F | 5.5" |
| November | 38°F | 63°F | 49°F | 6.2" |
| December | 33°F | 54°F | 43°F | 6.9" |
| Index | South Carthage | Tennessee | National |
| Air quality index | 25 | 76 | 42 |
| Pollution index | 699,752 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 360 |
| Days with good air quality | 351 |
| Days with moderate air quality | 9 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Watertown, TN | 1,698 | 25 | 50.0% |
| Carthage, TN | 2,533 | 25 | 50.0% |
| Alexandria, TN | 992 | 25 | 50.0% |
| Gordonsville, TN | 1,548 | 25 | 50.0% |
| Hartsville (Trousdale County) , TN | 7,970 | 45 | 10.0% |
| South Carthage, TN | 1,575 | 25 | 50.0% |
| City | Population | Air Quality Index | National Avg. |
| Concord, AL | 1,575 | 53 | 6.0% |
| South Lancaster, MA | 1,575 | 40 | 20.0% |
| Oakland, NE | 1,575 | 40 | 20.0% |
| Shinnecock Hills, NY | 1,575 | 41 | 18.0% |
| Jackson Center, OH | 1,575 | 39 | 22.0% |
| South Carthage, TN | 1,575 | 25 | 50.0% |
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