| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 44°F | 34°F | 4.2" |
| February | 25°F | 47°F | 35°F | 3.4" |
| March | 35°F | 59°F | 46°F | 4.1" |
| April | 45°F | 70°F | 57°F | 5.7" |
| May | 53°F | 77°F | 65°F | 5.0" |
| June | 62°F | 86°F | 74°F | 5.2" |
| July | 65°F | 88°F | 76°F | 6.1" |
| August | 64°F | 88°F | 76°F | 4.7" |
| September | 57°F | 82°F | 69°F | 3.9" |
| October | 46°F | 71°F | 57°F | 4.0" |
| November | 35°F | 59°F | 46°F | 3.0" |
| December | 29°F | 48°F | 38°F | 5.2" |
| Index | Perryville | Kentucky | National |
| Air quality index | 33 | 45 | 42 |
| Pollution index | 306,537 | 1,369,131 | 2,726,193 |
| Measurement | Total |
| Days measured | 114 |
| Days with good air quality | 96 |
| Days with moderate air quality | 18 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| 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. |
| Junction City, KY | 1,944 | 33 | 34.0% |
| Danville, KY | 16,801 | 33 | 34.0% |
| Springfield, KY | 2,965 | 39 | 22.0% |
| Bradfordsville, KY | 336 | 40 | 20.0% |
| Hustonville, KY | 564 | 40 | 20.0% |
| Perryville, KY | 964 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Magnet Cove, AR | 964 | 38 | 24.0% |
| Clermont, GA | 964 | 37 | 26.0% |
| Arnolds Park, IA | 964 | 36 | 28.0% |
| Start, LA | 964 | 34 | 32.0% |
| Glasgow, OR | 964 | 19 | 62.0% |
| Perryville, KY | 964 | 33 | 34.0% |
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