| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 30°F | 23°F | 3.5" |
| February | 13°F | 31°F | 22°F | 2.7" |
| March | 23°F | 44°F | 33°F | 3.6" |
| April | 33°F | 57°F | 45°F | 6.2" |
| May | 44°F | 69°F | 57°F | 6.7" |
| June | 53°F | 77°F | 65°F | 5.9" |
| July | 57°F | 81°F | 69°F | 6.2" |
| August | 56°F | 79°F | 67°F | 5.1" |
| September | 49°F | 72°F | 60°F | 4.9" |
| October | 39°F | 59°F | 48°F | 4.9" |
| November | 30°F | 47°F | 38°F | 4.5" |
| December | 21°F | 34°F | 28°F | 2.3" |
| Index | Le Roy | Michigan | National |
| Air quality index | 36 | 69 | 42 |
| Pollution index | 1,468,630 | 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 | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Reed City, MI | 2,114 | 36 | 28.0% |
| Wedgewood, MI | 248 | 36 | 28.0% |
| Cadillac, MI | 10,841 | 36 | 28.0% |
| Caberfae, MI | 65 | 36 | 28.0% |
| Evart, MI | 1,706 | 36 | 28.0% |
| Le Roy, MI | 279 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Denning, AR | 279 | 36 | 28.0% |
| Golf, FL | 279 | 41 | 18.0% |
| Payne, GA | 279 | 38 | 24.0% |
| Bertram, IA | 279 | 39 | 22.0% |
| Perry, IL | 279 | 41 | 18.0% |
| Le Roy, MI | 279 | 36 | 28.0% |