| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 3°F | 22°F | 12°F | 0.9" |
| February | 4°F | 25°F | 15°F | 1.0" |
| March | 17°F | 38°F | 28°F | 1.5" |
| April | 30°F | 52°F | 40°F | 2.5" |
| May | 40°F | 64°F | 51°F | 4.0" |
| June | 49°F | 74°F | 61°F | 4.7" |
| July | 56°F | 80°F | 68°F | 3.4" |
| August | 54°F | 77°F | 65°F | 4.5" |
| September | 47°F | 70°F | 58°F | 3.2" |
| October | 36°F | 55°F | 45°F | 3.2" |
| November | 23°F | 40°F | 31°F | 1.7" |
| December | 9°F | 25°F | 16°F | 1.7" |
| Index | Cloquet | Minnesota | National |
| Air quality index | 35 | 35 | 42 |
| Pollution index | 1,760,360 | 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 | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.010% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Carlton, MN | 1,006 | 35 | 30.0% |
| Scanlon, MN | 1,103 | 35 | 30.0% |
| Esko, MN | 2,222 | 35 | 30.0% |
| Wrenshall, MN | 459 | 35 | 30.0% |
| Brookston, MN | 117 | 35 | 30.0% |
| Cloquet, MN | 11,994 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Winfield, KS | 11,990 | 40 | 20.0% |
| Fuller Heights, FL | 11,989 | 36 | 28.0% |
| Brown Deer, WI | 11,987 | 44 | 12.0% |
| Wetaskiwin County No. 10, AB | 11,985 | n/a | |
| Norton, OH | 11,984 | 43 | 14.0% |
| Cloquet, MN | 11,994 | 35 | 30.0% |
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