| 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 | Southgate | Kentucky | National |
| Air quality index | 54 | 45 | 42 |
| Pollution index | 23,937,200 | 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 | 0.500% |
| Benzene | 0.180% |
| Carbon Tetrachloride | 0.110% |
| Lead | 0.250% |
| Mercury | 0.060% |
| City | Population | Air Quality Index | National Avg. |
| Amberley, OH | 3,532 | 54 | 8.0% |
| Day Heights, OH | 2,484 | 54 | 8.0% |
| Golf Manor, OH | 3,566 | 54 | 8.0% |
| Miami Heights, OH | 4,439 | 54 | 8.0% |
| Norwood, OH | 19,843 | 54 | 8.0% |
| Southgate, KY | 3,957 | 54 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Lake San Marcos, CA | 3,957 | 64 | 28.0% |
| Level Green, PA | 3,957 | 56 | 12.0% |
| Grand Mound, WA | 3,957 | 20 | 60.0% |
| Ashland, MO | 3,956 | 38 | 24.0% |
| Weaverville, NC | 3,956 | 44 | 12.0% |
| Southgate, KY | 3,957 | 54 | 8.0% |
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