| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 31°F | 25°F | 3.3" |
| February | 17°F | 29°F | 23°F | 1.4" |
| March | 24°F | 38°F | 31°F | 2.5" |
| April | 36°F | 50°F | 42°F | 4.2" |
| May | 46°F | 62°F | 53°F | 2.2" |
| June | 59°F | 77°F | 67°F | 6.8" |
| July | 62°F | 78°F | 69°F | 6.4" |
| August | 63°F | 78°F | 70°F | 8.3" |
| September | 57°F | 75°F | 65°F | 10.4" |
| October | 50°F | 64°F | 57°F | 11.5" |
| November | 33°F | 47°F | 40°F | 3.8" |
| December | 23°F | 32°F | 28°F | 3.0" |
| Index | Forestville | Michigan | National |
| Air quality index | 26 | 69 | 42 |
| Pollution index | 449,908 | 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 | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Minden City, MI | 182 | 26 | 48.0% |
| Deckerville, MI | 903 | 26 | 48.0% |
| Harbor Beach, MI | 1,862 | 26 | 48.0% |
| Forestville, MI | 126 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Venetie, AK | 126 | 38 | 24.0% |
| Toxey, AL | 126 | 36 | 28.0% |
| Gu Oidak, AZ | 126 | 47 | 6.0% |
| Myers Flat, CA | 126 | 27 | 46.0% |
| Portland, CO | 126 | 44 | 12.0% |
| Forestville, MI | 126 | 26 | 48.0% |
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