| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 32°F | 26°F | 2.0" |
| February | 17°F | 31°F | 24°F | 2.0" |
| March | 26°F | 41°F | 33°F | 1.8" |
| April | 36°F | 52°F | 43°F | 3.7" |
| May | 46°F | 64°F | 54°F | 3.0" |
| June | 56°F | 73°F | 63°F | 3.8" |
| July | 62°F | 79°F | 70°F | 3.2" |
| August | 62°F | 77°F | 69°F | 2.9" |
| September | 56°F | 72°F | 63°F | 3.3" |
| October | 46°F | 61°F | 53°F | 3.9" |
| November | 34°F | 48°F | 41°F | 2.2" |
| December | 25°F | 36°F | 30°F | 2.3" |
| Index | Elkton | Michigan | National |
| Air quality index | 26 | 69 | 42 |
| Pollution index | 7,127,120 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 316 |
| Days with good air quality | 288 |
| Days with moderate air quality | 28 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.160% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.050% |
| Mercury | 0.140% |
| City | Population | Air Quality Index | National Avg. |
| Unionville, MI | 654 | 26 | 48.0% |
| Kinde, MI | 475 | 26 | 48.0% |
| Bad Axe, MI | 2,930 | 26 | 48.0% |
| Owendale, MI | 301 | 26 | 48.0% |
| Caseville, MI | 600 | 26 | 48.0% |
| Elkton, MI | 768 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Unalakleet, AK | 768 | 38 | 24.0% |
| London, AR | 768 | 38 | 24.0% |
| Hana, HI | 768 | 15 | 70.0% |
| Ashland, KS | 768 | 15 | 70.0% |
| Kevil, KY | 768 | 44 | 12.0% |
| Elkton, MI | 768 | 26 | 48.0% |
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