| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 46°F | 36°F | 3.5" |
| February | 28°F | 48°F | 37°F | 3.1" |
| March | 38°F | 61°F | 49°F | 4.6" |
| April | 48°F | 73°F | 60°F | 6.3" |
| May | 57°F | 80°F | 68°F | 5.3" |
| June | 66°F | 88°F | 77°F | 4.5" |
| July | 69°F | 90°F | 79°F | 4.7" |
| August | 68°F | 90°F | 79°F | 4.2" |
| September | 61°F | 84°F | 72°F | 4.4" |
| October | 49°F | 73°F | 60°F | 4.4" |
| November | 37°F | 61°F | 48°F | 3.4" |
| December | 31°F | 49°F | 39°F | 5.1" |
| Index | Galena | Indiana | National |
| Air quality index | 49 | 56 | 42 |
| Pollution index | 10,162,700 | 2,719,453 | 2,726,193 |
| 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. |
| Henryville, IN | 1,698 | 49 | 2.0% |
| Palmyra, IN | 1,553 | 49 | 2.0% |
| Greenville, IN | 1,380 | 49 | 2.0% |
| New Salisbury, IN | 613 | 49 | 2.0% |
| Seneca Gardens, KY | 672 | 49 | 2.0% |
| Galena, IN | 1,253 | 49 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Edina, MO | 1,253 | 41 | 18.0% |
| Walnut, MS | 1,253 | 39 | 22.0% |
| Creighton, NE | 1,253 | 35 | 30.0% |
| Munday, TX | 1,253 | 26 | 48.0% |
| Orangeville, UT | 1,253 | 46 | 8.0% |
| Galena, IN | 1,253 | 49 | 2.0% |
Here are the best places to live in Indiana
10 Best cities in Indiana for employment
Top 10 cities in Indiana with the best education system
Check out the 10 safest cities in Indiana