Grand Marais Minnesota Simple English Wikipedia the free Climate within the heart of Grand Marais, Minnesota is perpetually changing. Whether it's bright or cloudy, you can expect an array of weather patterns over the year. Beginning in the breathtaking springtime flowers blossoming to the hot and sun-filled summer days, to the scenic autumn foliage, and the snowy landscapes in winter, Grand Marais, Minnesota offers a varied range of climate experiences throughout the year.