| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 42°F | 32°F | 2.7" |
| February | 24°F | 44°F | 34°F | 2.6" |
| March | 34°F | 57°F | 44°F | 4.1" |
| April | 43°F | 69°F | 56°F | 4.9" |
| May | 52°F | 77°F | 64°F | 3.9" |
| June | 61°F | 85°F | 73°F | 4.5" |
| July | 65°F | 87°F | 75°F | 4.7" |
| August | 63°F | 87°F | 75°F | 2.7" |
| September | 56°F | 81°F | 67°F | 3.3" |
| October | 45°F | 69°F | 56°F | 3.6" |
| November | 33°F | 57°F | 44°F | 2.9" |
| December | 28°F | 46°F | 36°F | 3.7" |
| Index | California | Kentucky | National |
| Air quality index | 54 | 45 | 42 |
| Pollution index | 746,363 | 1,369,131 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 139 |
| Days with moderate air quality | 206 |
| Days w/ poor A.Q. for sensitive groups | 20 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.060% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Claryville, KY | 2,896 | 54 | 8.0% |
| Butler, KY | 720 | 54 | 8.0% |
| Park Hills, KY | 2,993 | 54 | 8.0% |
| Fruit Hill, OH | 4,426 | 54 | 8.0% |
| Withamsville, OH | 7,754 | 54 | 8.0% |
| California, KY | 82 | 54 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Needham, AL | 82 | 36 | 28.0% |
| Toronto, IA | 82 | 46 | 8.0% |
| Vining, IA | 82 | 39 | 22.0% |
| Junction, IL | 82 | 45 | 10.0% |
| Holt, MN | 82 | 33 | 34.0% |
| California, KY | 82 | 54 | 8.0% |
Here are the best places to live in Kentucky
These are the 10 cheapest cities in Kentucky
See the best places to live in California
Check out the 10 most dangerous cities in Kentucky