| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 2°F | 20°F | 11°F | 1.4" |
| February | 3°F | 24°F | 13°F | 1.1" |
| March | 19°F | 39°F | 28°F | 2.8" |
| April | 31°F | 52°F | 41°F | 2.9" |
| May | 42°F | 65°F | 53°F | 4.3" |
| June | 52°F | 74°F | 62°F | 5.1" |
| July | 57°F | 79°F | 68°F | 4.8" |
| August | 55°F | 76°F | 65°F | 4.7" |
| September | 48°F | 68°F | 57°F | 4.6" |
| October | 37°F | 54°F | 44°F | 2.8" |
| November | 24°F | 39°F | 30°F | 3.1" |
| December | 7°F | 22°F | 14°F | 1.4" |
| Index | Calumet | Minnesota | National |
| Air quality index | 35 | 35 | 42 |
| Pollution index | 2,593,130 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 326 |
| Days with moderate air quality | 38 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.060% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.040% |
| Mercury | 0.200% |
| City | Population | Air Quality Index | National Avg. |
| Grand Rapids, MN | 11,218 | 29 | 42.0% |
| La Prairie, MN | 732 | 29 | 42.0% |
| Bovey, MN | 726 | 35 | 30.0% |
| Warba, MN | 184 | 35 | 30.0% |
| Keewatin, MN | 1,255 | 35 | 30.0% |
| Calumet, MN | 341 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Midland, AR | 341 | 36 | 28.0% |
| Shirley, AR | 341 | 36 | 28.0% |
| Edmundson Acres, CA | 341 | 67 | 34.0% |
| Mad River, CA | 341 | 27 | 46.0% |
| Richfield, CA | 341 | 41 | 18.0% |
| Calumet, MN | 341 | 35 | 30.0% |
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