| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 33°F | 24°F | 2.6" |
| February | 16°F | 34°F | 25°F | 1.7" |
| March | 25°F | 47°F | 35°F | 2.4" |
| April | 35°F | 62°F | 48°F | 3.5" |
| May | 46°F | 72°F | 59°F | 3.9" |
| June | 56°F | 81°F | 69°F | 4.5" |
| July | 60°F | 85°F | 72°F | 3.5" |
| August | 58°F | 83°F | 70°F | 4.4" |
| September | 51°F | 76°F | 63°F | 3.0" |
| October | 41°F | 63°F | 51°F | 3.7" |
| November | 31°F | 50°F | 40°F | 2.6" |
| December | 22°F | 37°F | 29°F | 2.3" |
| Index | Ashley | Michigan | National |
| Air quality index | 36 | 69 | 42 |
| Pollution index | 1,401,450 | 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 | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.005% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Alma, MI | 8,918 | 26 | 48.0% |
| Elsie, MI | 1,066 | 36 | 28.0% |
| Ithaca, MI | 2,864 | 36 | 28.0% |
| Fowler, MI | 1,559 | 36 | 28.0% |
| Maple Rapids, MI | 685 | 36 | 28.0% |
| Ashley, MI | 505 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Galena, AK | 505 | 38 | 24.0% |
| Beulah Valley, CO | 505 | 20 | 60.0% |
| Sumner, GA | 505 | 40 | 20.0% |
| Royal, IA | 505 | 35 | 30.0% |
| Cisne, IL | 505 | 43 | 14.0% |
| Ashley, MI | 505 | 36 | 28.0% |
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