| 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 | Aberdeen | Indiana | National |
| Air quality index | 37 | 56 | 50 |
| Pollution index | 898,555 | 3,773,618 | 5,066,862 |
| 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, State | Population | Air Quality Index | National Avg. |
| Burns Harbor, IN | 1,301 | 37 | 26% |
| Hobart, IN | 28,693 | 37 | 26% |
| New Chicago, IN | 1,805 | 37 | 26% |
| South Haven, IN | 5,042 | 37 | 26% |
| Ogden Dunes, IN | 1,138 | 37 | 26% |
| Aberdeen, IN | 1,771 | 37 | 26% |
| City, State | Population | Air Quality Index | National Avg. |
| Olive Hill, KY | 1,771 | 14 | 72% |
| West Baraboo, WI | 1,771 | 35 | 30% |
| Monterey Park, NM | 1,771 | 53 | 6% |
| Forreston, IL | 1,771 | 42 | 16% |
| Montour Falls, NY | 1,771 | 35 | 30% |
| Aberdeen, IN | 1,771 | 37 | 26% |
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