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| 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 | Germantown | Louisville | Kentucky |
| Air quality index | 49 | 49 | 45 |
| Pollution index | 10,162,700 | 10,162,700 | 1,369,131 |
| 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. |
| Greenville, IN | 1,380 | 49 | 2.0% |
| Bellewood, KY | 218 | 49 | 2.0% |
| Hurstbourne, KY | 4,402 | 49 | 2.0% |
| Lincolnshire, KY | 128 | 49 | 2.0% |
| Richlawn, KY | 374 | 49 | 2.0% |
| Louisville, KY | 618,733 | 49 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Baltimore, MD | 602,274 | 46 | 8.0% |
| Las Vegas, NV | 644,594 | 54 | 8.0% |
| Milwaukee, WI | 592,649 | 44 | 12.0% |
| Oklahoma City, OK | 649,821 | 48 | 4.0% |
| Portland, OR | 650,380 | 38 | 24.0% |
| Louisville, KY | 618,733 | 49 | 2.0% |
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