Grand Marais Minnesota Simple English Wikipedia the free Climate inside the heart of Grand Marais, Minnesota is always fluctuating. Whether it is clear or overcast, you can expect a selection of climate conditions throughout the year. From the gorgeous springtime flowers blooming to the balmy and sun-soaked summertime days, to the colorful fall foliage, and the snow-covered landscapes in winter, Grand Marais, Minnesota presents a varied variety of weather experiences all through the year.