| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 10°F | 28°F | 20°F | 1.3" |
| February | 8°F | 29°F | 19°F | 0.7" |
| March | 16°F | 40°F | 28°F | 1.5" |
| April | 29°F | 54°F | 41°F | 2.5" |
| May | 39°F | 68°F | 54°F | 2.8" |
| June | 49°F | 77°F | 63°F | 3.4" |
| July | 53°F | 81°F | 68°F | 2.6" |
| August | 53°F | 79°F | 66°F | 3.3" |
| September | 46°F | 72°F | 59°F | 3.5" |
| October | 37°F | 58°F | 48°F | 4.7" |
| November | 28°F | 46°F | 37°F | 2.7" |
| December | 18°F | 32°F | 26°F | 1.9" |
| Index | Petoskey | Michigan | National |
| Air quality index | 36 | 69 | 42 |
| Pollution index | 2,221,050 | 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 | 0.040% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Pellston, MI | 755 | 32 | 36.0% |
| Ellsworth, MI | 337 | 36 | 28.0% |
| Brutus, MI | 102 | 36 | 28.0% |
| Horton Bay, MI | 450 | 36 | 28.0% |
| Ponshewaing, MI | 31 | 36 | 28.0% |
| Petoskey, MI | 5,701 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Denair, CA | 5,702 | 49 | 2.0% |
| El Cerrito CDP, CA | 5,699 | 40 | 20.0% |
| East Ferris, ON | 5,697 | n/a | |
| Nazareth, PA | 5,705 | 42 | 16.0% |
| Dowagiac, MI | 5,695 | 39 | 22.0% |
| Petoskey, MI | 5,701 | 36 | 28.0% |
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