| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 33°F | 25°F | 1.8" |
| February | 15°F | 34°F | 25°F | 1.6" |
| March | 26°F | 47°F | 36°F | 2.4" |
| April | 36°F | 61°F | 48°F | 3.4" |
| May | 46°F | 72°F | 59°F | 3.8" |
| June | 54°F | 80°F | 68°F | 3.7" |
| July | 58°F | 84°F | 72°F | 3.2" |
| August | 57°F | 82°F | 70°F | 2.7" |
| September | 50°F | 76°F | 62°F | 2.4" |
| October | 40°F | 63°F | 51°F | 2.5" |
| November | 29°F | 50°F | 40°F | 2.1" |
| December | 22°F | 38°F | 30°F | 1.9" |
| Index | Dexter | Michigan | National |
| Air quality index | 40 | 69 | 42 |
| Pollution index | 180,667 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 292 |
| Days with moderate air quality | 73 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Manchester, MI | 2,170 | 39 | 22.0% |
| Stockbridge, MI | 1,416 | 40 | 20.0% |
| Pinckney, MI | 2,132 | 40 | 20.0% |
| Ann Arbor, MI | 121,093 | 40 | 20.0% |
| Whitmore Lake, MI | 8,010 | 40 | 20.0% |
| Dexter, MI | 4,691 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| New Freedom, PA | 4,691 | 41 | 18.0% |
| Stock Island, FL | 4,692 | 34 | 32.0% |
| Hanamaulu, HI | 4,689 | 13 | 74.0% |
| Fountain Hill, PA | 4,693 | 42 | 16.0% |
| Penn Estates, PA | 4,688 | 34 | 32.0% |
| Dexter, MI | 4,691 | 40 | 20.0% |
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