| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 45°F | 34°F | 4.2" |
| February | 29°F | 50°F | 38°F | 4.0" |
| March | 38°F | 60°F | 48°F | 4.9" |
| April | 48°F | 73°F | 59°F | 5.8" |
| May | 55°F | 78°F | 65°F | 5.2" |
| June | 63°F | 84°F | 72°F | 5.1" |
| July | 66°F | 85°F | 75°F | 6.8" |
| August | 65°F | 84°F | 73°F | 5.6" |
| September | 59°F | 79°F | 68°F | 3.2" |
| October | 48°F | 70°F | 58°F | 3.7" |
| November | 38°F | 60°F | 48°F | 2.9" |
| December | 32°F | 50°F | 40°F | 5.2" |
| Index | Hazel Green | Kentucky | National |
| Air quality index | 33 | 45 | 42 |
| Pollution index | 297,888 | 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 | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Frenchburg, KY | 890 | 33 | 34.0% |
| Maytown, KY | 115 | 33 | 34.0% |
| Campton, KY | 326 | 33 | 34.0% |
| Ezel, KY | 232 | 33 | 34.0% |
| West Liberty, KY | 3,497 | 42 | 16.0% |
| Hazel Green, KY | 83 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Goodyears Bar, CA | 83 | 44 | 12.0% |
| Rock Creek Park, CO | 83 | 58 | 16.0% |
| McIntire, IA | 83 | 15 | 70.0% |
| Columbus, IL | 83 | 41 | 18.0% |
| Fort Ripley, MN | 83 | 29 | 42.0% |
| Hazel Green, KY | 83 | 33 | 34.0% |