| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 46°F | 36°F | 3.5" |
| February | 28°F | 48°F | 37°F | 3.1" |
| March | 38°F | 61°F | 49°F | 4.6" |
| April | 48°F | 73°F | 60°F | 6.3" |
| May | 57°F | 80°F | 68°F | 5.3" |
| June | 66°F | 88°F | 77°F | 4.5" |
| July | 69°F | 90°F | 79°F | 4.7" |
| August | 68°F | 90°F | 79°F | 4.2" |
| September | 61°F | 84°F | 72°F | 4.4" |
| October | 49°F | 73°F | 60°F | 4.4" |
| November | 37°F | 61°F | 48°F | 3.4" |
| December | 31°F | 49°F | 39°F | 5.1" |
| Index | Shepherdsville | Kentucky | National |
| Air quality index | 49 | 45 | 42 |
| Pollution index | 10,162,700 | 1,369,131 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 195 |
| Days with moderate air quality | 166 |
| Days w/ poor A.Q. for sensitive groups | 4 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.050% |
| Mercury | 0.140% |
| City | Population | Air Quality Index | National Avg. |
| Vine Grove, KY | 6,234 | 39 | 22.0% |
| Boston, KY | 138 | 39 | 22.0% |
| Fort Knox, KY | 8,865 | 39 | 22.0% |
| Lebanon Junction, KY | 2,276 | 39 | 22.0% |
| Radcliff, KY | 22,796 | 39 | 22.0% |
| Shepherdsville, KY | 13,757 | 49 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Fergus Falls, MN | 13,754 | 33 | 34.0% |
| D'Iberville, MS | 13,766 | 42 | 16.0% |
| Grimes, IA | 13,746 | 39 | 22.0% |
| Chaparral, NM | 13,744 | 53 | 6.0% |
| Lincoln, IL | 13,742 | 40 | 20.0% |
| Shepherdsville, KY | 13,757 | 49 | 2.0% |
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