| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 46°F | 37°F | 7.2" |
| February | 24°F | 44°F | 33°F | 3.6" |
| March | 35°F | 58°F | 46°F | 5.3" |
| April | 43°F | 67°F | 55°F | 7.0" |
| May | 50°F | 78°F | 64°F | 5.5" |
| June | 62°F | 86°F | 74°F | 2.0" |
| July | 65°F | 88°F | 76°F | 5.7" |
| August | 68°F | 92°F | 79°F | 8.9" |
| September | 59°F | 85°F | 71°F | 2.7" |
| October | 48°F | 72°F | 59°F | 10.4" |
| November | 35°F | 59°F | 46°F | 5.6" |
| December | 29°F | 45°F | 36°F | 5.7" |
| Index | Springfield | 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. |
| Perryville, KY | 997 | 33 | 34.0% |
| Lebanon, KY | 6,121 | 39 | 22.0% |
| Loretto, KY | 743 | 39 | 22.0% |
| Bardstown, KY | 13,551 | 39 | 22.0% |
| Raywick, KY | 173 | 39 | 22.0% |
| Springfield, KY | 3,048 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| East Syracuse, NY | 3,048 | 37 | 26.0% |
| Saint-Liboire, QC | 3,048 | n/a | |
| Navy Yard City, WA | 3,049 | 18 | 64.0% |
| Escatawpa, MS | 3,050 | 32 | 36.0% |
| Nags Head, NC | 3,050 | 40 | 20.0% |
| Springfield, KY | 3,048 | 39 | 22.0% |