| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 33°F | 25°F | 1.6" |
| February | 19°F | 35°F | 26°F | 1.4" |
| March | 30°F | 49°F | 39°F | 2.0" |
| April | 40°F | 62°F | 50°F | 3.3" |
| May | 50°F | 73°F | 61°F | 3.4" |
| June | 60°F | 82°F | 70°F | 3.9" |
| July | 63°F | 84°F | 73°F | 4.0" |
| August | 61°F | 82°F | 71°F | 4.9" |
| September | 55°F | 77°F | 65°F | 2.4" |
| October | 44°F | 64°F | 53°F | 3.6" |
| November | 33°F | 51°F | 41°F | 2.1" |
| December | 23°F | 37°F | 30°F | 1.8" |
| Index | Roselawn | Indiana | National |
| Air quality index | 37 | 56 | 42 |
| Pollution index | 898,555 | 2,719,453 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 305 |
| Days with moderate air quality | 55 |
| Days w/ poor A.Q. for sensitive groups | 4 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.005% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Lake Dalecarlia, IN | 1,779 | 37 | 26.0% |
| Kouts, IN | 2,330 | 37 | 26.0% |
| De Motte, IN | 4,093 | 37 | 26.0% |
| Shelby, IN | 370 | 37 | 26.0% |
| Lake Village, IN | 707 | 37 | 26.0% |
| Roselawn, IN | 3,519 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Mora, MN | 3,519 | 32 | 36.0% |
| Helena Valley Northeast, MT | 3,519 | 40 | 20.0% |
| Dunham, QC | 3,519 | n/a | |
| Pittsboro, IN | 3,518 | 54 | 8.0% |
| Paw Paw Lake, MI | 3,520 | 39 | 22.0% |
| Roselawn, IN | 3,519 | 37 | 26.0% |
Here are the best places to live in Indiana
Check out the 10 safest cities in Indiana
Top 10 cities in Indiana with the best education system
10 best cities to buy a new house in Indiana