Unfortunately, you would not be able to grow peace lily year-round outside in Minnesota. As a tropical plant, it might do OK in Plant Hardiness Zone 10b to 12, but Minnesota is Zones 3 to 5. You can, however, put it outside in a pot in a shady spot with bright indirect sunlight, and keep things moist. Monitor and take the plant indoors for the season before temperatures dip below 40 degrees F. It is happiest in daytime temperatures between 68 and 85 and nighttime temperatures about 10 degrees cooler.
Unfortunately, you would not be able to grow peace lily year-round outside in Minnesota. As a tropical plant, it might do OK in Plant Hardiness Zone 10b to 12, but Minnesota is Zones 3 to 5. You can, however, put it outside in a pot in a shady spot with bright indirect sunlight, and keep things moist. Monitor and take the plant indoors for the season before temperatures dip below 40 degrees F. It is happiest in daytime temperatures between 68 and 85 and nighttime temperatures about 10 degrees cooler.