| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 45°F | 35°F | 3.7" |
| February | 29°F | 47°F | 37°F | 2.9" |
| March | 39°F | 60°F | 48°F | 4.5" |
| April | 48°F | 71°F | 59°F | 6.3" |
| May | 57°F | 79°F | 68°F | 5.7" |
| June | 66°F | 87°F | 77°F | 5.3" |
| July | 69°F | 89°F | 79°F | 5.6" |
| August | 68°F | 89°F | 78°F | 3.7" |
| September | 61°F | 83°F | 71°F | 4.6" |
| October | 48°F | 71°F | 59°F | 4.4" |
| November | 38°F | 59°F | 48°F | 3.5" |
| December | 31°F | 48°F | 39°F | 4.8" |
| Index | Simpsonville | 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. |
| Hills and Dales, KY | 165 | 49 | 2.0% |
| Murray Hill, KY | 613 | 49 | 2.0% |
| Spring Valley, KY | 819 | 49 | 2.0% |
| Cambridge, KY | 129 | 49 | 2.0% |
| Smithfield, KY | 213 | 49 | 2.0% |
| Simpsonville, KY | 2,868 | 49 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Bald Knob, AR | 2,868 | 45 | 10.0% |
| St. Helen, MI | 2,868 | 36 | 28.0% |
| Drumright, OK | 2,868 | 45 | 10.0% |
| North Sioux City, SD | 2,868 | 35 | 30.0% |
| Pemberton, BC | 2,868 | n/a | |
| Simpsonville, KY | 2,868 | 49 | 2.0% |
Here are the best places to live in Kentucky
Most Dangerous States In The US
Check out the 10 safest cities in Kentucky
See the best places to live in Simpsonville