| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 33°F | 25°F | 2.4" |
| February | 15°F | 35°F | 25°F | 1.8" |
| March | 25°F | 47°F | 35°F | 2.3" |
| April | 35°F | 62°F | 48°F | 3.3" |
| May | 46°F | 73°F | 60°F | 4.9" |
| June | 56°F | 82°F | 69°F | 3.4" |
| July | 59°F | 85°F | 73°F | 3.8" |
| August | 58°F | 83°F | 71°F | 3.5" |
| September | 51°F | 77°F | 63°F | 3.4" |
| October | 41°F | 64°F | 52°F | 2.9" |
| November | 30°F | 51°F | 40°F | 2.2" |
| December | 22°F | 37°F | 30°F | 2.0" |
| Index | Bancroft | Michigan | National |
| Air quality index | 38 | 69 | 42 |
| Pollution index | 8,357,230 | 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 | 0.070% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.090% |
| Mercury | 0.120% |
| City | Population | Air Quality Index | National Avg. |
| Perry, MI | 2,248 | 36 | 28.0% |
| Webberville, MI | 1,238 | 36 | 28.0% |
| Williamston, MI | 3,939 | 36 | 28.0% |
| Laingsburg, MI | 1,586 | 36 | 28.0% |
| Fowlerville, MI | 2,888 | 36 | 28.0% |
| Bancroft, MI | 454 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Pakala Village, HI | 454 | 13 | 74.0% |
| Chase, KS | 454 | 40 | 20.0% |
| Bland, MO | 454 | 39 | 22.0% |
| Bogue Chitto, MS | 454 | 36 | 28.0% |
| Bradshaw, NE | 454 | 19 | 62.0% |
| Bancroft, MI | 454 | 38 | 24.0% |
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