| 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 | 964 | 33 | 34.0% |
| Lebanon, KY | 5,960 | 39 | 22.0% |
| Loretto, KY | 723 | 39 | 22.0% |
| Bardstown, KY | 13,169 | 39 | 22.0% |
| Raywick, KY | 170 | 39 | 22.0% |
| Springfield, KY | 2,965 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Nags Head, NC | 2,965 | 40 | 20.0% |
| North Cypress-Langford, MB | 2,965 | n/a | |
| Fort Macleod, AB | 2,965 | n/a | |
| Denver, NC | 2,964 | 36 | 28.0% |
| National Park, NJ | 2,964 | 51 | 2.0% |
| Springfield, KY | 2,965 | 39 | 22.0% |
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