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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 49°F | 41°F | 8.3" |
| February | 31°F | 49°F | 39°F | 5.6" |
| March | 42°F | 65°F | 52°F | 2.7" |
| April | 48°F | 70°F | 58°F | 6.3" |
| May | 56°F | 80°F | 68°F | 5.2" |
| June | 65°F | 87°F | 75°F | 4.9" |
| July | 69°F | 89°F | 78°F | 5.1" |
| August | 71°F | 94°F | 82°F | 12.1" |
| September | 63°F | 85°F | 73°F | 5.3" |
| October | 52°F | 74°F | 62°F | 16.9" |
| November | 40°F | 62°F | 50°F | 4.5" |
| December | 32°F | 49°F | 39°F | 7.8" |
| Index | Dover | Tennessee | National |
| Air quality index | 40 | 76 | 42 |
| Pollution index | 218,509 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 307 |
| Days with moderate air quality | 58 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Erin, TN | 1,742 | 40 | 20.0% |
| Tennessee Ridge, TN | 1,341 | 40 | 20.0% |
| LaFayette, KY | 172 | 40 | 20.0% |
| Cumberland City, TN | 347 | 40 | 20.0% |
| Dover, TN | 1,726 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Hallsville, MO | 1,726 | 38 | 24.0% |
| Malvern, OH | 1,726 | 46 | 8.0% |
| Freedom, PA | 1,726 | 6 | 88.0% |
| Terrace Bay, ON | 1,726 | n/a | |
| Brooklyn, IA | 1,725 | 39 | 22.0% |
| Dover, TN | 1,726 | 40 | 20.0% |
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