| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 30°F | 22°F | 3.3" |
| February | 12°F | 30°F | 21°F | 2.0" |
| March | 22°F | 39°F | 30°F | 4.6" |
| April | 36°F | 57°F | 46°F | 4.2" |
| May | 47°F | 70°F | 58°F | 3.2" |
| June | 56°F | 78°F | 67°F | 6.0" |
| July | 59°F | 79°F | 69°F | 6.4" |
| August | 56°F | 78°F | 67°F | 7.0" |
| September | 49°F | 73°F | 60°F | 1.5" |
| October | 43°F | 61°F | 51°F | 4.4" |
| November | 29°F | 43°F | 36°F | 3.7" |
| December | 22°F | 34°F | 28°F | 0.7" |
| Index | Sandusky | Michigan | National |
| Air quality index | 38 | 69 | 42 |
| Pollution index | 449,908 | 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 | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Snover, MI | 300 | 26 | 48.0% |
| Deckerville, MI | 903 | 26 | 48.0% |
| Port Sanilac, MI | 654 | 38 | 24.0% |
| Croswell, MI | 2,402 | 38 | 24.0% |
| Lexington, MI | 1,180 | 38 | 24.0% |
| Sandusky, MI | 2,796 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Lindsay, OK | 2,796 | 48 | 4.0% |
| Quail Ridge, FL | 2,795 | 43 | 14.0% |
| Tilton Northfield, NH | 2,795 | 31 | 38.0% |
| Wallace-Woodworth, MB | 2,795 | n/a | |
| Tilton, IL | 2,797 | 42 | 16.0% |
| Sandusky, MI | 2,796 | 38 | 24.0% |
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