| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 35°F | 29°F | 3.1" |
| February | 22°F | 36°F | 29°F | 1.8" |
| March | 34°F | 49°F | 41°F | 8.5" |
| April | 43°F | 62°F | 52°F | 4.3" |
| May | 53°F | 72°F | 62°F | 7.9" |
| June | 62°F | 80°F | 71°F | 3.6" |
| July | 67°F | 83°F | 76°F | 9.5" |
| August | 65°F | 82°F | 74°F | 6.3" |
| September | 58°F | 76°F | 67°F | 7.6" |
| October | 47°F | 65°F | 56°F | 8.0" |
| November | 37°F | 52°F | 44°F | 5.7" |
| December | 27°F | 39°F | 33°F | 2.7" |
| Index | Hobart | Indiana | National |
| Air quality index | 37 | 56 | 42 |
| Pollution index | 1,558,070 | 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 | 0.010% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.070% |
| Lead | 0.090% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Merrillville, IN | 35,881 | 37 | 26.0% |
| Aberdeen, IN | 1,765 | 37 | 26.0% |
| Hebron, IN | 3,804 | 37 | 26.0% |
| New Chicago, IN | 1,883 | 37 | 26.0% |
| South Haven, IN | 5,189 | 37 | 26.0% |
| Hobart, IN | 28,763 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Immokalee, FL | 28,766 | 34 | 32.0% |
| Washington, UT | 28,756 | 44 | 12.0% |
| Rockledge, FL | 28,774 | 36 | 28.0% |
| Williston, ND | 28,744 | 34 | 32.0% |
| Slidell, LA | 28,740 | 45 | 10.0% |
| Hobart, IN | 28,763 | 37 | 26.0% |