| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 8°F | 26°F | 17°F | 0.8" |
| February | 10°F | 30°F | 20°F | 1.0" |
| March | 24°F | 45°F | 34°F | 1.5" |
| April | 37°F | 61°F | 48°F | 3.5" |
| May | 49°F | 73°F | 60°F | 3.9" |
| June | 60°F | 82°F | 70°F | 4.8" |
| July | 65°F | 87°F | 76°F | 3.7" |
| August | 62°F | 83°F | 72°F | 5.3" |
| September | 54°F | 77°F | 64°F | 2.9" |
| October | 41°F | 62°F | 51°F | 3.1" |
| November | 27°F | 47°F | 37°F | 1.3" |
| December | 13°F | 30°F | 21°F | 1.6" |
| Index | Harrison | Minneapolis | Minnesota |
| Air quality index | 46 | 46 | 35 |
| Pollution index | 21,650,500 | 21,650,500 | 1,854,519 |
| 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 | 0.290% |
| Benzene | 0.280% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.380% |
| Mercury | 0.080% |
| City | Population | Air Quality Index | National Avg. |
| Mendota Heights, MN | 11,339 | 46 | 8.0% |
| Shoreview, MN | 26,922 | 46 | 8.0% |
| Burnsville, MN | 61,536 | 46 | 8.0% |
| Richfield, MN | 36,253 | 46 | 8.0% |
| Medina, MN | 6,549 | 46 | 8.0% |
| Minneapolis, MN | 424,536 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Oakland, CA | 422,575 | 40 | 20.0% |
| London, ON | 421,456 | n/a | |
| Laval, QC | 445,050 | n/a | |
| Tulsa, OK | 402,441 | 45 | 10.0% |
| Virginia Beach, VA | 450,882 | 40 | 20.0% |
| Minneapolis, MN | 424,536 | 46 | 8.0% |
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