| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 49°F | 38°F | 5.2" |
| February | 32°F | 54°F | 42°F | 4.5" |
| March | 40°F | 65°F | 52°F | 5.8" |
| April | 49°F | 75°F | 61°F | 6.8" |
| May | 57°F | 81°F | 68°F | 3.4" |
| June | 65°F | 89°F | 76°F | 5.4" |
| July | 69°F | 90°F | 78°F | 6.3" |
| August | 67°F | 89°F | 77°F | 4.6" |
| September | 61°F | 84°F | 71°F | 4.6" |
| October | 49°F | 74°F | 60°F | 3.4" |
| November | 38°F | 62°F | 49°F | 4.5" |
| December | 35°F | 53°F | 43°F | 6.8" |
| Index | Lenoir City | Tennessee | National |
| Air quality index | 53 | 76 | 42 |
| Pollution index | 7,263,220 | 2,454,916 | 2,726,193 |
| 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 | 0.240% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.003% |
| Lead | 0.080% |
| Mercury | 0.300% |
| City | Population | Air Quality Index | National Avg. |
| Philadelphia, TN | 808 | 30 | 40.0% |
| Sweetwater, TN | 5,894 | 30 | 40.0% |
| Vonore, TN | 1,931 | 30 | 40.0% |
| Friendsville, TN | 1,050 | 46 | 8.0% |
| Greenback, TN | 1,233 | 46 | 8.0% |
| Lenoir City, TN | 9,191 | 53 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Taft, CA | 9,189 | 67 | 34.0% |
| Lancaster, SC | 9,187 | 49 | 2.0% |
| Valley, AL | 9,195 | 42 | 16.0% |
| Fruitland Park, FL | 9,185 | 38 | 24.0% |
| Belgrade, MT | 9,184 | 25 | 50.0% |
| Lenoir City, TN | 9,191 | 53 | 6.0% |
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