| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 1°F | 19°F | 9°F | 0.3" |
| February | 1°F | 22°F | 11°F | 1.2" |
| March | 18°F | 38°F | 27°F | 5.4" |
| April | 30°F | 52°F | 40°F | 3.6" |
| May | 42°F | 65°F | 53°F | 3.7" |
| June | 52°F | 74°F | 63°F | 9.0" |
| July | 57°F | 80°F | 68°F | 18.1" |
| August | 54°F | 77°F | 65°F | 1.7" |
| September | 47°F | 68°F | 57°F | 13.9" |
| October | 36°F | 53°F | 44°F | 4.1" |
| November | 22°F | 38°F | 29°F | 5.0" |
| December | 6°F | 21°F | 13°F | 2.4" |
| Index | Shevlin | Minnesota | National |
| Air quality index | 33 | 35 | 42 |
| Pollution index | 1,861,440 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 327 |
| Days with moderate air quality | 34 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.003% |
| Lead | 0.070% |
| Mercury | 0.040% |
| City | Population | Air Quality Index | National Avg. |
| Wilton, MN | 158 | 29 | 42.0% |
| West Roy Lake, MN | 38 | 33 | 34.0% |
| Rice Lake CDP, MN | 349 | 33 | 34.0% |
| Bagley, MN | 1,308 | 33 | 34.0% |
| Clearbrook, MN | 636 | 33 | 34.0% |
| Shevlin, MN | 156 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Winthrop, AR | 156 | 39 | 22.0% |
| Kirkwood, CA | 156 | 13 | 74.0% |
| Philo, CA | 156 | 33 | 34.0% |
| Rowan, IA | 156 | 15 | 70.0% |
| Kirwin, KS | 156 | 19 | 62.0% |
| Shevlin, MN | 156 | 33 | 34.0% |
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