| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 8°F | 24°F | 16°F | 1.1" |
| February | 10°F | 28°F | 18°F | 2.5" |
| March | 25°F | 42°F | 33°F | 3.5" |
| April | 37°F | 58°F | 47°F | 4.5" |
| May | 48°F | 71°F | 59°F | 7.9" |
| June | 59°F | 80°F | 68°F | 6.7" |
| July | 63°F | 84°F | 73°F | 5.2" |
| August | 60°F | 81°F | 70°F | 6.5" |
| September | 53°F | 74°F | 62°F | 4.2" |
| October | 40°F | 60°F | 49°F | 4.5" |
| November | 27°F | 45°F | 35°F | 3.2" |
| December | 13°F | 28°F | 20°F | 2.0" |
| Index | Winthrop | Minnesota | National |
| Air quality index | 46 | 35 | 42 |
| Pollution index | 848,330 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 214 |
| Days with moderate air quality | 148 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.003% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Gibbon, MN | 806 | 32 | 36.0% |
| Buffalo Lake, MN | 653 | 32 | 36.0% |
| Stewart, MN | 610 | 32 | 36.0% |
| Gaylord, MN | 1,958 | 46 | 8.0% |
| Lafayette, MN | 545 | 46 | 8.0% |
| Winthrop, MN | 1,317 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Reidville, SC | 1,317 | 44 | 12.0% |
| Ames Lake, WA | 1,317 | 45 | 10.0% |
| Augusta, WI | 1,317 | 34 | 32.0% |
| Julian, CA | 1,318 | 64 | 28.0% |
| La Harpe, IL | 1,318 | 29 | 42.0% |
| Winthrop, MN | 1,317 | 46 | 8.0% |
Here are the best places to live in Minnesota
10 Best cities in Minnesota for employment
Top 10 best public schools in Winthrop
Check out the 10 safest cities in Minnesota