| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 39°F | 29°F | 3.5" |
| February | 21°F | 42°F | 31°F | 2.6" |
| March | 32°F | 55°F | 43°F | 4.0" |
| April | 42°F | 68°F | 55°F | 5.3" |
| May | 52°F | 76°F | 64°F | 4.8" |
| June | 62°F | 85°F | 73°F | 5.7" |
| July | 65°F | 87°F | 76°F | 4.9" |
| August | 65°F | 87°F | 75°F | 3.3" |
| September | 57°F | 81°F | 68°F | 3.4" |
| October | 45°F | 68°F | 56°F | 3.2" |
| November | 33°F | 55°F | 44°F | 3.3" |
| December | 25°F | 42°F | 33°F | 4.1" |
| Index | Brooklyn | Indiana | National |
| Air quality index | 54 | 56 | 42 |
| Pollution index | 2,395,300 | 2,719,453 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 148 |
| Days with moderate air quality | 212 |
| Days w/ poor A.Q. for sensitive groups | 5 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Trafalgar, IN | 1,244 | 41 | 18.0% |
| Princes Lakes, IN | 1,424 | 41 | 18.0% |
| Painted Hills, IN | 525 | 42 | 16.0% |
| Paragon, IN | 467 | 42 | 16.0% |
| Martinsville, IN | 11,807 | 42 | 16.0% |
| Brooklyn, IN | 2,633 | 54 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Marionville, MO | 2,633 | 39 | 22.0% |
| Summit, MS | 2,633 | 30 | 40.0% |
| Tool, TX | 2,633 | 41 | 18.0% |
| Winamac, IN | 2,634 | 37 | 26.0% |
| East Newark, NJ | 2,634 | 51 | 2.0% |
| Brooklyn, IN | 2,633 | 54 | 8.0% |
Here are the best places to live in Indiana
Check out the 10 safest cities in Indiana
Top 10 best public schools in Brooklyn
These are the 10 most affordable cities in Indiana