| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 33°F | 25°F | 1.6" |
| February | 17°F | 34°F | 25°F | 1.5" |
| March | 28°F | 47°F | 37°F | 1.8" |
| April | 38°F | 61°F | 49°F | 2.9" |
| May | 49°F | 73°F | 60°F | 3.0" |
| June | 58°F | 81°F | 69°F | 3.5" |
| July | 61°F | 84°F | 73°F | 3.5" |
| August | 60°F | 82°F | 70°F | 2.9" |
| September | 53°F | 76°F | 64°F | 2.5" |
| October | 42°F | 64°F | 52°F | 2.0" |
| November | 32°F | 50°F | 40°F | 2.3" |
| December | 24°F | 38°F | 30°F | 2.0" |
| Index | Adrian | Michigan | National |
| Air quality index | 39 | 69 | 42 |
| Pollution index | 2,493,750 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 358 |
| Days with good air quality | 286 |
| Days with moderate air quality | 72 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Clinton, MI | 2,885 | 39 | 22.0% |
| Cement City, MI | 520 | 39 | 22.0% |
| Tecumseh, MI | 8,361 | 39 | 22.0% |
| Britton, MI | 631 | 39 | 22.0% |
| Clayton, MI | 267 | 39 | 22.0% |
| Adrian, MI | 20,550 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Hammond, LA | 20,557 | 30 | 40.0% |
| Palm Valley, FL | 20,540 | 43 | 14.0% |
| Prunedale, CA | 20,560 | 37 | 26.0% |
| Bryant, AR | 20,563 | 45 | 10.0% |
| Marblehead, MA | 20,530 | 43 | 14.0% |
| Adrian, MI | 20,550 | 39 | 22.0% |
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