| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 49°F | 39°F | 5.9" |
| February | 31°F | 51°F | 40°F | 3.7" |
| March | 40°F | 63°F | 50°F | 4.7" |
| April | 48°F | 73°F | 60°F | 5.8" |
| May | 56°F | 79°F | 67°F | 4.7" |
| June | 65°F | 87°F | 75°F | 3.2" |
| July | 68°F | 88°F | 77°F | 6.2" |
| August | 69°F | 90°F | 78°F | 3.3" |
| September | 62°F | 83°F | 71°F | 3.9" |
| October | 49°F | 71°F | 59°F | 4.3" |
| November | 38°F | 61°F | 48°F | 4.2" |
| December | 33°F | 51°F | 41°F | 6.3" |
| Index | Coalfield | Tennessee | National |
| Air quality index | 53 | 76 | 50 |
| Pollution index | 299,574 | 3,610,474 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 148 |
| Days with moderate air quality | 216 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| Farragut, TN | 21,690 | 46 | 8% |
| Harriman, TN | 6,223 | 53 | 6% |
| Oakdale, TN | 194 | 53 | 6% |
| Rockwood, TN | 5,443 | 53 | 6% |
| Kingston, TN | 5,841 | 53 | 6% |
| Coalfield, TN | 2,671 | 53 | 6% |
| City, State | Population | Air Quality Index | National Avg. |
| Mondovi, WI | 2,671 | 355 | 610% |
| Poland, OH | 2,671 | 45 | 10% |
| Webster County, GA | 2,672 | 33 | 34% |
| Keaau, HI | 2,672 | 142 | 184% |
| Lakehurst, NJ | 2,673 | 40 | 20% |
| Coalfield, TN | 2,671 | 53 | 6% |