Live Grand Marais Harbor Webcam MN USAClimate in the heart of Grand Marais, Minnesota is perpetually changing. Whether bright or overcast, look forward to an array of climate patterns over the year. Starting from the stunning spring flowers blossoming to the hot and sun-filled summertime days, to the vibrant autumn foliage, and the wintry landscapes in winter, Grand Marais, Minnesota presents a diverse variety of weather experiences during the year.