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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 48°F | 36°F | 3.8" |
| February | 28°F | 52°F | 39°F | 3.1" |
| March | 36°F | 63°F | 48°F | 4.2" |
| April | 44°F | 73°F | 58°F | 4.4" |
| May | 53°F | 79°F | 65°F | 4.1" |
| June | 60°F | 87°F | 73°F | 3.3" |
| July | 65°F | 88°F | 75°F | 6.5" |
| August | 63°F | 87°F | 74°F | 4.8" |
| September | 57°F | 82°F | 68°F | 3.1" |
| October | 45°F | 72°F | 57°F | 3.2" |
| November | 33°F | 61°F | 46°F | 2.8" |
| December | 31°F | 52°F | 40°F | 4.6" |
| Index | Blountville | Tennessee | National |
| Air quality index | 45 | 76 | 42 |
| Pollution index | 1,072,440 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 236 |
| Days with moderate air quality | 108 |
| Days w/ poor A.Q. for sensitive groups | 21 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.040% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Walnut Hill, TN | 2,534 | 45 | 10.0% |
| Bluff City, TN | 2,093 | 45 | 10.0% |
| Elizabethton, TN | 13,568 | 45 | 10.0% |
| Oak Grove, TN | 4,353 | 45 | 10.0% |
| Bloomingdale, TN | 9,428 | 45 | 10.0% |
| Blountville, TN | 3,387 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Jewett City, CT | 3,387 | 37 | 26.0% |
| Carey, OH | 3,386 | 39 | 22.0% |
| Marathon, ON | 3,386 | n/a | |
| Eielson AFB, AK | 3,388 | 38 | 24.0% |
| Rio Dell, CA | 3,388 | 27 | 46.0% |
| Blountville, TN | 3,387 | 45 | 10.0% |
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