| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 32°F | 25°F | 3.5" |
| February | 16°F | 32°F | 24°F | 2.2" |
| March | 26°F | 43°F | 33°F | 2.2" |
| April | 36°F | 57°F | 45°F | 2.8" |
| May | 46°F | 69°F | 57°F | 3.2" |
| June | 56°F | 77°F | 66°F | 3.6" |
| July | 61°F | 81°F | 71°F | 4.0" |
| August | 60°F | 80°F | 69°F | 3.3" |
| September | 53°F | 74°F | 63°F | 3.1" |
| October | 43°F | 62°F | 52°F | 2.5" |
| November | 33°F | 49°F | 41°F | 2.9" |
| December | 24°F | 37°F | 30°F | 3.0" |
| Index | Lexington | Michigan | National |
| Air quality index | 38 | 69 | 42 |
| Pollution index | 30,180,300 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 340 |
| Days with good air quality | 282 |
| Days with moderate air quality | 58 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.390% |
| Carbon Tetrachloride | 0.080% |
| Lead | 0.130% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Sandusky, MI | 2,870 | 38 | 24.0% |
| Peck, MI | 632 | 38 | 24.0% |
| Yale, MI | 2,263 | 38 | 24.0% |
| Carsonville, MI | 496 | 38 | 24.0% |
| Applegate, MI | 234 | 38 | 24.0% |
| Lexington, MI | 1,211 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Griswold, IA | 1,211 | 40 | 20.0% |
| Andrews, IN | 1,211 | 31 | 38.0% |
| Catahoula, LA | 1,211 | 41 | 18.0% |
| Fort Loudon, PA | 1,211 | 36 | 28.0% |
| North Apollo, PA | 1,211 | 38 | 24.0% |
| Lexington, MI | 1,211 | 38 | 24.0% |