| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 44°F | 34°F | 4.2" |
| February | 25°F | 47°F | 35°F | 3.4" |
| March | 35°F | 59°F | 46°F | 4.1" |
| April | 45°F | 70°F | 57°F | 5.7" |
| May | 53°F | 77°F | 65°F | 5.0" |
| June | 62°F | 86°F | 74°F | 5.2" |
| July | 65°F | 88°F | 76°F | 6.1" |
| August | 64°F | 88°F | 76°F | 4.7" |
| September | 57°F | 82°F | 69°F | 3.9" |
| October | 46°F | 71°F | 57°F | 4.0" |
| November | 35°F | 59°F | 46°F | 3.0" |
| December | 29°F | 48°F | 38°F | 5.2" |
| Index | Winchester | Kentucky | National |
| Air quality index | 42 | 45 | 42 |
| Pollution index | 1,209,030 | 1,369,131 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 303 |
| Days with moderate air quality | 62 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Clay City, KY | 1,008 | 33 | 34.0% |
| Mount Sterling, KY | 7,404 | 42 | 16.0% |
| North Middletown, KY | 749 | 42 | 16.0% |
| Paris, KY | 10,056 | 42 | 16.0% |
| Sharpsburg, KY | 485 | 42 | 16.0% |
| Winchester, KY | 18,950 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| East Massapequa, NY | 18,953 | 51 | 2.0% |
| Milledgeville, GA | 18,956 | 38 | 24.0% |
| Laurel, MS | 18,971 | 35 | 30.0% |
| Orange, TX | 18,926 | 45 | 10.0% |
| Greater Vancouver A, BC | 18,924 | n/a | |
| Winchester, KY | 18,950 | 42 | 16.0% |