| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 9°F | 25°F | 17°F | 1.9" |
| February | 11°F | 29°F | 19°F | 1.9" |
| March | 26°F | 43°F | 34°F | 3.2" |
| April | 37°F | 59°F | 47°F | 3.3" |
| May | 48°F | 71°F | 59°F | 5.1" |
| June | 59°F | 79°F | 69°F | 7.0" |
| July | 62°F | 83°F | 72°F | 7.4" |
| August | 59°F | 80°F | 69°F | 5.1" |
| September | 53°F | 74°F | 62°F | 8.7" |
| October | 40°F | 60°F | 49°F | 3.9" |
| November | 28°F | 46°F | 36°F | 4.9" |
| December | 14°F | 29°F | 22°F | 2.9" |
| Index | Zumbrota | Minnesota | National |
| Air quality index | 37 | 35 | 42 |
| Pollution index | 2,142,550 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 216 |
| Days with good air quality | 203 |
| Days with moderate air quality | 13 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.510% |
| City | Population | Air Quality Index | National Avg. |
| West Concord, MN | 775 | 36 | 28.0% |
| Mazeppa, MN | 935 | 36 | 28.0% |
| Zumbro Falls, MN | 223 | 36 | 28.0% |
| Oronoco, MN | 1,517 | 36 | 28.0% |
| Hammond, MN | 109 | 36 | 28.0% |
| Zumbrota, MN | 3,452 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Heflin, AL | 3,453 | 38 | 24.0% |
| Saint-Maurice, QC | 3,450 | n/a | |
| Ringgold, GA | 3,454 | 46 | 8.0% |
| Sheridan, IN | 3,454 | 54 | 8.0% |
| Golden Grove, SC | 3,449 | 46 | 8.0% |
| Zumbrota, MN | 3,452 | 37 | 26.0% |
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