| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 31°F | 25°F | 3.5" |
| February | 18°F | 33°F | 25°F | 2.9" |
| March | 29°F | 47°F | 37°F | 4.2" |
| April | 39°F | 60°F | 49°F | 3.4" |
| May | 51°F | 71°F | 60°F | 8.2" |
| June | 60°F | 79°F | 69°F | 6.2" |
| July | 62°F | 82°F | 72°F | 3.9" |
| August | 61°F | 80°F | 70°F | 5.0" |
| September | 54°F | 74°F | 63°F | 2.8" |
| October | 44°F | 62°F | 52°F | 4.9" |
| November | 33°F | 49°F | 40°F | 2.8" |
| December | 24°F | 36°F | 30°F | 2.5" |
| Index | Ashley | Indiana | National |
| Air quality index | 45 | 56 | 42 |
| Pollution index | 1,872,410 | 2,719,453 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 236 |
| Days with moderate air quality | 128 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Orland, IN | 464 | 37 | 26.0% |
| Hamilton, IN | 1,702 | 45 | 10.0% |
| St. Joe, IN | 456 | 45 | 10.0% |
| Altona, IN | 509 | 45 | 10.0% |
| Butler, IN | 2,889 | 45 | 10.0% |
| Ashley, IN | 1,051 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Mineral Springs, AR | 1,051 | 39 | 22.0% |
| Alhambra Valley, CA | 1,051 | 40 | 20.0% |
| Hydesville, CA | 1,051 | 27 | 46.0% |
| Janesville, IA | 1,051 | 39 | 22.0% |
| Argenta, IL | 1,051 | 44 | 12.0% |
| Ashley, IN | 1,051 | 45 | 10.0% |
Here are the best places to live in Indiana
Top 10 cities in Indiana with the best education system
Top 10 best public schools in Ashley
10 Best cities in Indiana for employment