| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 26°F | 19°F | 2.3" |
| February | 11°F | 26°F | 19°F | 1.4" |
| March | 17°F | 38°F | 28°F | 2.1" |
| April | 30°F | 54°F | 42°F | 3.2" |
| May | 42°F | 66°F | 54°F | 3.2" |
| June | 55°F | 80°F | 67°F | 7.1" |
| July | 55°F | 80°F | 68°F | 4.7" |
| August | 55°F | 78°F | 67°F | 8.9" |
| September | 50°F | 73°F | 61°F | 3.6" |
| October | 42°F | 61°F | 51°F | 3.1" |
| November | 27°F | 41°F | 34°F | 3.8" |
| December | 17°F | 28°F | 23°F | 2.3" |
| Index | Walloon Lake | Michigan | National |
| Air quality index | 36 | 69 | 42 |
| Pollution index | 1,397,210 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 247 |
| Days with good air quality | 232 |
| Days with moderate air quality | 15 |
| 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 | 0.003% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Advance, MI | 380 | 36 | 28.0% |
| Ellsworth, MI | 347 | 36 | 28.0% |
| Bay View, MI | 182 | 36 | 28.0% |
| Ironton, MI | 116 | 36 | 28.0% |
| Boyne City, MI | 3,807 | 36 | 28.0% |
| Walloon Lake, MI | 318 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Dillon Beach, CA | 318 | 34 | 32.0% |
| Coal Creek town, CO | 318 | 47 | 6.0% |
| Romeo, CO | 318 | 15 | 70.0% |
| Bostwick, GA | 318 | 44 | 12.0% |
| Twin Lakes, IA | 318 | 37 | 26.0% |
| Walloon Lake, MI | 318 | 36 | 28.0% |