| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 33°F | 25°F | 2.2" |
| February | 17°F | 34°F | 25°F | 1.8" |
| March | 27°F | 47°F | 36°F | 2.2" |
| April | 37°F | 61°F | 48°F | 3.3" |
| May | 47°F | 72°F | 59°F | 3.8" |
| June | 57°F | 80°F | 69°F | 4.0" |
| July | 60°F | 83°F | 72°F | 3.7" |
| August | 59°F | 81°F | 70°F | 4.2" |
| September | 52°F | 75°F | 63°F | 3.0" |
| October | 42°F | 63°F | 52°F | 3.1" |
| November | 32°F | 50°F | 40°F | 2.3" |
| December | 23°F | 37°F | 30°F | 2.0" |
| Index | Springport | Michigan | National |
| Air quality index | 36 | 69 | 42 |
| Pollution index | 8,357,230 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 330 |
| Days with moderate air quality | 35 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.070% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.090% |
| Mercury | 0.120% |
| City | Population | Air Quality Index | National Avg. |
| Charlotte, MI | 9,069 | 36 | 28.0% |
| Leslie, MI | 2,178 | 36 | 28.0% |
| Parma, MI | 538 | 36 | 28.0% |
| Mason, MI | 8,441 | 36 | 28.0% |
| Olivet, MI | 1,675 | 36 | 28.0% |
| Springport, MI | 848 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Exira, IA | 848 | 40 | 20.0% |
| Welcome, MN | 848 | 15 | 70.0% |
| Grazierville, PA | 848 | 41 | 18.0% |
| Detroit, TX | 848 | 325 | 550.0% |
| Savoonga, AK | 849 | 38 | 24.0% |
| Springport, MI | 848 | 36 | 28.0% |
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