| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 25°F | 17°F | 2.3" |
| February | 12°F | 27°F | 19°F | 2.5" |
| March | 26°F | 44°F | 34°F | 4.6" |
| April | 40°F | 60°F | 49°F | 6.1" |
| May | 51°F | 71°F | 60°F | 4.4" |
| June | 63°F | 83°F | 73°F | 6.3" |
| July | 66°F | 86°F | 76°F | 4.2" |
| August | 62°F | 81°F | 71°F | 9.3" |
| September | 56°F | 77°F | 65°F | 12.5" |
| October | 46°F | 63°F | 53°F | 4.2" |
| November | 29°F | 45°F | 36°F | 2.8" |
| December | 11°F | 25°F | 18°F | 1.5" |
| Index | Lakeville | Minnesota | National |
| Air quality index | 46 | 35 | 42 |
| Pollution index | 7,686,740 | 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 | 0.070% |
| Benzene | 0.100% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.350% |
| Mercury | 0.120% |
| City | Population | Air Quality Index | National Avg. |
| Northfield, MN | 20,399 | 37 | 26.0% |
| Hampton, MN | 586 | 37 | 26.0% |
| Randolph, MN | 481 | 37 | 26.0% |
| Vermillion, MN | 484 | 37 | 26.0% |
| Eagan, MN | 66,377 | 46 | 8.0% |
| Lakeville, MN | 65,710 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Eastvale, CA | 65,766 | 89 | 78.0% |
| Shawnee, KS | 65,844 | 47 | 6.0% |
| Madera, CA | 65,575 | 50 | = 100 |
| Auburn, AL | 65,508 | 42 | 16.0% |
| Halton Hills, ON | 65,483 | n/a | |
| Lakeville, MN | 65,710 | 46 | 8.0% |
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