| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 35°F | 26°F | 2.9" |
| February | 18°F | 37°F | 27°F | 2.4" |
| March | 28°F | 51°F | 39°F | 3.1" |
| April | 38°F | 65°F | 51°F | 4.0" |
| May | 49°F | 75°F | 62°F | 4.9" |
| June | 59°F | 84°F | 71°F | 5.1" |
| July | 62°F | 86°F | 74°F | 4.1" |
| August | 60°F | 84°F | 72°F | 4.4" |
| September | 53°F | 79°F | 65°F | 3.3" |
| October | 42°F | 67°F | 53°F | 2.9" |
| November | 31°F | 53°F | 42°F | 3.2" |
| December | 23°F | 39°F | 31°F | 3.1" |
| Index | New Haven | Indiana | National |
| Air quality index | 45 | 56 | 42 |
| Pollution index | 2,775,870 | 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 | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.380% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Zanesville, IN | 625 | 31 | 38.0% |
| Monroeville, IN | 1,315 | 45 | 10.0% |
| Harlan, IN | 1,715 | 45 | 10.0% |
| Ossian, IN | 3,352 | 45 | 10.0% |
| Huntertown, IN | 7,224 | 45 | 10.0% |
| New Haven, IN | 15,934 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Dyer, IN | 15,933 | 55 | 10.0% |
| Easthampton Town, MA | 15,930 | 40 | 20.0% |
| Comox, BC | 15,938 | n/a | |
| Walnut Park, CA | 15,939 | 72 | 44.0% |
| Washougal, WA | 15,927 | 38 | 24.0% |
| New Haven, IN | 15,934 | 45 | 10.0% |
Here are the best places to live in Indiana
Safest States In The US
Check out the 10 safest cities in Indiana
See the best places to live in New Haven