| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 9°F | 25°F | 16°F | 0.5" |
| February | 11°F | 28°F | 19°F | 0.8" |
| March | 26°F | 44°F | 34°F | 1.5" |
| April | 39°F | 59°F | 48°F | 4.1" |
| May | 50°F | 72°F | 60°F | 4.4" |
| June | 60°F | 81°F | 70°F | 5.8" |
| July | 65°F | 85°F | 75°F | 4.8" |
| August | 62°F | 82°F | 72°F | 6.0" |
| September | 55°F | 75°F | 64°F | 3.1" |
| October | 42°F | 60°F | 50°F | 3.1" |
| November | 29°F | 46°F | 36°F | 1.3" |
| December | 14°F | 28°F | 21°F | 1.3" |
| Index | Hopkins | Minnesota | National |
| Air quality index | 46 | 35 | 42 |
| Pollution index | 1,774,860 | 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 | 0.001% |
| Lead | 0.003% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Arden Hills, MN | 10,276 | 46 | 8.0% |
| Mendota, MN | 149 | 46 | 8.0% |
| St. Paul, MN | 305,877 | 46 | 8.0% |
| Brooklyn Center, MN | 30,755 | 46 | 8.0% |
| Minneapolis, MN | 424,536 | 46 | 8.0% |
| Hopkins, MN | 18,400 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Laurel, MS | 18,403 | 35 | 30.0% |
| Springboro, OH | 18,416 | 47 | 6.0% |
| St. John, IN | 18,382 | 55 | 10.0% |
| Rutherford, NJ | 18,376 | 51 | 2.0% |
| Niles, OH | 18,429 | 42 | 16.0% |
| Hopkins, MN | 18,400 | 46 | 8.0% |
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