| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 48°F | 38°F | 4.1" |
| February | 22°F | 45°F | 33°F | 3.8" |
| March | 31°F | 55°F | 41°F | 8.2" |
| April | 46°F | 69°F | 56°F | 11.0" |
| May | 56°F | 78°F | 66°F | 0.8" |
| June | 65°F | 83°F | 74°F | 12.8" |
| July | 68°F | 86°F | 76°F | 7.5" |
| August | 65°F | 85°F | 74°F | 5.1" |
| September | 61°F | 82°F | 70°F | 4.7" |
| October | 48°F | 71°F | 58°F | 13.4" |
| November | 38°F | 59°F | 46°F | 3.2" |
| December | 32°F | 50°F | 40°F | 7.1" |
| Index | Ironville | Kentucky | National |
| Air quality index | 42 | 45 | 42 |
| Pollution index | 2,559,040 | 1,369,131 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 299 |
| Days with moderate air quality | 66 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.390% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Worthington, KY | 1,639 | 14 | 72.0% |
| Wurtland, KY | 1,452 | 14 | 72.0% |
| Greenup, KY | 1,233 | 14 | 72.0% |
| Franklin Furnace, OH | 1,795 | 14 | 72.0% |
| Hanging Rock, OH | 168 | 14 | 72.0% |
| Ironville, KY | 1,028 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Garden Plain, KS | 1,028 | 40 | 20.0% |
| Whitewater, KS | 1,028 | 40 | 20.0% |
| Harmony, MN | 1,028 | 15 | 70.0% |
| Cooleemee, NC | 1,028 | 40 | 20.0% |
| Stromsburg, NE | 1,028 | 19 | 62.0% |
| Ironville, KY | 1,028 | 42 | 16.0% |
Here are the best places to live in Kentucky
Check out the 10 most dangerous cities in Kentucky
Check out the 10 safest cities in Kentucky
These are the largest cities in Kentucky