| 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 | Lynch | Kentucky | National |
| Air quality index | 45 | 45 | 42 |
| Pollution index | 7,824,360 | 1,369,131 | 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 | 0.060% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.070% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Kenvir, KY | 467 | 39 | 22.0% |
| Mayking, KY | 513 | 45 | 10.0% |
| Benham, KY | 581 | 45 | 10.0% |
| Pennington Gap, VA | 2,310 | 45 | 10.0% |
| Dryden, VA | 891 | 45 | 10.0% |
| Lynch, KY | 536 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Holly Grove, AR | 536 | 43 | 14.0% |
| Cumming, IA | 536 | 39 | 22.0% |
| Bismarck, IL | 536 | 42 | 16.0% |
| Chapin, IL | 536 | 40 | 20.0% |
| Fithian, IL | 536 | 42 | 16.0% |
| Lynch, KY | 536 | 45 | 10.0% |
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