| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 46°F | 39°F | 6.7" |
| February | 28°F | 44°F | 36°F | 4.3" |
| March | 40°F | 60°F | 49°F | 4.9" |
| April | 47°F | 68°F | 57°F | 5.8" |
| May | 56°F | 78°F | 67°F | 6.0" |
| June | 66°F | 86°F | 75°F | 5.9" |
| July | 68°F | 86°F | 77°F | 8.8" |
| August | 71°F | 92°F | 81°F | 12.6" |
| September | 63°F | 85°F | 73°F | 4.4" |
| October | 52°F | 73°F | 61°F | 13.9" |
| November | 39°F | 60°F | 48°F | 7.1" |
| December | 30°F | 46°F | 37°F | 7.5" |
| Index | Lebanon | Kentucky | National |
| Air quality index | 39 | 45 | 42 |
| Pollution index | 306,537 | 1,369,131 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 318 |
| Days with moderate air quality | 45 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Loretto, KY | 723 | 39 | 22.0% |
| Springfield, KY | 2,965 | 39 | 22.0% |
| New Hope, KY | 63 | 39 | 22.0% |
| Raywick, KY | 170 | 39 | 22.0% |
| Bradfordsville, KY | 336 | 40 | 20.0% |
| Lebanon, KY | 5,960 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Pea Ridge, AR | 5,960 | 44 | 12.0% |
| Stratmoor, CO | 5,960 | 45 | 10.0% |
| Gladewater, TX | 5,960 | 37 | 26.0% |
| Forest Glen, MD | 5,957 | 47 | 6.0% |
| Norwood, PA | 5,957 | 51 | 2.0% |
| Lebanon, KY | 5,960 | 39 | 22.0% |
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