| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 4°F | 21°F | 12°F | 0.3" |
| February | 6°F | 24°F | 14°F | 0.3" |
| March | 21°F | 39°F | 29°F | 1.1" |
| April | 34°F | 55°F | 44°F | 2.1" |
| May | 46°F | 68°F | 56°F | 3.3" |
| June | 57°F | 77°F | 66°F | 4.0" |
| July | 62°F | 83°F | 72°F | 4.0" |
| August | 59°F | 79°F | 69°F | 4.6" |
| September | 52°F | 72°F | 61°F | 3.2" |
| October | 39°F | 57°F | 47°F | 2.9" |
| November | 25°F | 41°F | 32°F | 0.9" |
| December | 9°F | 24°F | 16°F | 0.5" |
| Index | Carlos | Minnesota | National |
| Air quality index | 29 | 35 | 42 |
| Pollution index | 4,588,720 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 359 |
| Days with good air quality | 328 |
| Days with moderate air quality | 29 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.080% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.040% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Eagle Bend, MN | 641 | 29 | 42.0% |
| Brandon, MN | 674 | 29 | 42.0% |
| Garfield, MN | 362 | 29 | 42.0% |
| Miltona, MN | 372 | 29 | 42.0% |
| Millerville, MN | 106 | 29 | 42.0% |
| Carlos, MN | 410 | 29 | 42.0% |
| City | Population | Air Quality Index | National Avg. |
| Arboles, CO | 410 | 44 | 12.0% |
| Empire, CO | 410 | 47 | 6.0% |
| Prairie City, IL | 410 | 41 | 18.0% |
| Metamora, IN | 410 | 6 | 88.0% |
| Arcadia, KS | 410 | 37 | 26.0% |
| Carlos, MN | 410 | 29 | 42.0% |
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