| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 43°F | 34°F | 6.1" |
| February | 27°F | 46°F | 35°F | 5.4" |
| March | 38°F | 59°F | 47°F | 8.7" |
| April | 47°F | 71°F | 58°F | 10.2" |
| May | 58°F | 79°F | 68°F | 7.3" |
| June | 66°F | 87°F | 76°F | 7.8" |
| July | 67°F | 89°F | 77°F | 9.5" |
| August | 66°F | 88°F | 76°F | 6.9" |
| September | 58°F | 82°F | 69°F | 11.3" |
| October | 47°F | 71°F | 58°F | 10.3" |
| November | 37°F | 58°F | 46°F | 8.2" |
| December | 30°F | 47°F | 38°F | 9.0" |
| Index | Earlington | Kentucky | National |
| Air quality index | 43 | 45 | 42 |
| Pollution index | 768,150 | 1,369,131 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 276 |
| Days with moderate air quality | 87 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.005% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| St. Charles, KY | 305 | 40 | 20.0% |
| Dawson Springs, KY | 2,665 | 40 | 20.0% |
| White Plains, KY | 949 | 40 | 20.0% |
| Nortonville, KY | 985 | 40 | 20.0% |
| Madisonville, KY | 18,801 | 43 | 14.0% |
| Earlington, KY | 1,043 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Coker, AL | 1,043 | 35 | 30.0% |
| Hadley, NY | 1,043 | 37 | 26.0% |
| Marianne, PA | 1,043 | 33 | 34.0% |
| Saint-Bonaventure, QC | 1,043 | n/a | |
| Brantley, AL | 1,042 | 52 | 4.0% |
| Earlington, KY | 1,043 | 43 | 14.0% |
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