| 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 | Harrogate | Tennessee | National |
| Air quality index | 39 | 76 | 42 |
| Pollution index | 592,143 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 263 |
| Days with good air quality | 243 |
| Days with moderate air quality | 20 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cumberland Gap, TN | 337 | 39 | 22.0% |
| Ewing, VA | 152 | 39 | 22.0% |
| Pathfork, KY | 266 | 39 | 22.0% |
| Tazewell, TN | 2,321 | 39 | 22.0% |
| Middlesborough, KY | 9,242 | 39 | 22.0% |
| Harrogate, TN | 4,334 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Reidland, KY | 4,334 | 44 | 12.0% |
| Dillon, MT | 4,333 | 20 | 60.0% |
| Woodruff, SC | 4,333 | 44 | 12.0% |
| Del Mar, CA | 4,331 | 64 | 28.0% |
| Cumberland, BC | 4,331 | n/a | |
| Harrogate, TN | 4,334 | 39 | 22.0% |
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