| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 48°F | 37°F | 5.2" |
| February | 30°F | 51°F | 39°F | 7.4" |
| March | 38°F | 62°F | 49°F | 7.7" |
| April | 47°F | 73°F | 59°F | 7.8" |
| May | 55°F | 79°F | 66°F | 5.7" |
| June | 62°F | 86°F | 73°F | 6.7" |
| July | 66°F | 87°F | 75°F | 10.3" |
| August | 65°F | 87°F | 74°F | 5.1" |
| September | 60°F | 81°F | 69°F | 6.8" |
| October | 47°F | 72°F | 57°F | 10.0" |
| November | 36°F | 60°F | 46°F | 7.2" |
| December | 33°F | 51°F | 41°F | 10.2" |
| Index | Morristown | Tennessee | National |
| Air quality index | 44 | 76 | 42 |
| Pollution index | 20,443,500 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 234 |
| Days with good air quality | 197 |
| Days with moderate air quality | 37 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.050% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| New Market, TN | 1,576 | 44 | 12.0% |
| Mooresburg, TN | 705 | 44 | 12.0% |
| Baneberry, TN | 568 | 44 | 12.0% |
| White Pine, TN | 2,397 | 44 | 12.0% |
| Rutledge, TN | 1,477 | 44 | 12.0% |
| Morristown, TN | 29,887 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Chamblee, GA | 29,874 | 52 | 4.0% |
| Texarkana, AR | 29,864 | 39 | 22.0% |
| Greenville, MS | 29,854 | 43 | 14.0% |
| Oceanside, NY | 29,850 | 51 | 2.0% |
| Cornelius, NC | 29,836 | 49 | 2.0% |
| Morristown, TN | 29,887 | 44 | 12.0% |
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