| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 10°F | 24°F | 17°F | 2.3" |
| February | 9°F | 25°F | 17°F | 0.7" |
| March | 19°F | 36°F | 27°F | 1.8" |
| April | 29°F | 48°F | 38°F | 2.7" |
| May | 41°F | 63°F | 51°F | 3.7" |
| June | 50°F | 72°F | 61°F | 3.4" |
| July | 56°F | 77°F | 66°F | 3.1" |
| August | 55°F | 75°F | 64°F | 8.2" |
| September | 47°F | 68°F | 57°F | 4.1" |
| October | 38°F | 53°F | 45°F | 7.7" |
| November | 27°F | 40°F | 33°F | 3.5" |
| December | 15°F | 27°F | 21°F | 0.8" |
| Index | Marquette | Michigan | National |
| Air quality index | 8 | 69 | 42 |
| Pollution index | 735,464 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 59 |
| Days with good air quality | 59 |
| Days with moderate air quality | 0 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.004% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Negaunee, MI | 4,537 | 8 | 84.0% |
| Harvey, MI | 3,637 | 8 | 84.0% |
| Palmer, MI | 394 | 8 | 84.0% |
| Trowbridge Park, MI | 2,190 | 8 | 84.0% |
| Ishpeming, MI | 6,433 | 8 | 84.0% |
| Marquette, MI | 20,631 | 8 | 84.0% |
| City | Population | Air Quality Index | National Avg. |
| Ferguson, MO | 20,631 | 54 | 8.0% |
| Lloydminster (Part), AB | 20,628 | n/a | |
| Fernley, NV | 20,616 | 39 | 22.0% |
| Gardner, MA | 20,605 | 40 | 20.0% |
| Secaucus, NJ | 20,667 | 51 | 2.0% |
| Marquette, MI | 20,631 | 8 | 84.0% |
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