| 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 | Millersburg | Kentucky | National |
| Air quality index | 42 | 45 | 42 |
| Pollution index | 114,060 | 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 | 0.000% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| North Middletown, KY | 749 | 42 | 16.0% |
| Carlisle, KY | 2,499 | 42 | 16.0% |
| Paris, KY | 10,056 | 42 | 16.0% |
| Cynthiana, KY | 6,419 | 42 | 16.0% |
| Sharpsburg, KY | 485 | 42 | 16.0% |
| Millersburg, KY | 818 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Kernville, CA | 818 | 67 | 34.0% |
| Norris Canyon, CA | 818 | 40 | 20.0% |
| Blende, CO | 818 | 20 | 60.0% |
| Allentown, FL | 818 | 41 | 18.0% |
| Raymond, IA | 818 | 39 | 22.0% |
| Millersburg, KY | 818 | 42 | 16.0% |
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