| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 51°F | 40°F | 4.1" |
| February | 33°F | 53°F | 42°F | 3.4" |
| March | 41°F | 65°F | 52°F | 5.8" |
| April | 50°F | 74°F | 62°F | 5.8" |
| May | 58°F | 81°F | 69°F | 6.0" |
| June | 67°F | 89°F | 77°F | 4.8" |
| July | 69°F | 91°F | 79°F | 4.2" |
| August | 68°F | 91°F | 79°F | 3.0" |
| September | 61°F | 85°F | 72°F | 3.6" |
| October | 48°F | 74°F | 60°F | 3.5" |
| November | 39°F | 63°F | 50°F | 4.0" |
| December | 34°F | 53°F | 43°F | 5.5" |
| Index | Gadsden | Tennessee | National |
| Air quality index | 27 | 76 | 42 |
| Pollution index | 2,081,500 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 362 |
| Days with good air quality | 330 |
| Days with moderate air quality | 32 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Friendship, TN | 705 | 26 | 48.0% |
| Maury City, TN | 817 | 26 | 48.0% |
| Alamo, TN | 2,199 | 27 | 46.0% |
| Gibson, TN | 546 | 27 | 46.0% |
| Milan, TN | 7,642 | 27 | 46.0% |
| Gadsden, TN | 490 | 27 | 46.0% |
| City | Population | Air Quality Index | National Avg. |
| Scotia, CA | 490 | 27 | 46.0% |
| Fontana, KS | 490 | 47 | 6.0% |
| Cerulean, KY | 490 | 40 | 20.0% |
| Bordelonville, LA | 490 | 30 | 40.0% |
| Roxie, MS | 490 | 45 | 10.0% |
| Gadsden, TN | 490 | 27 | 46.0% |
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