Live Grand Marais Harbor Webcam MN USAWeather at the heart of Grand Marais, Minnesota is constantly fluctuating. Whether it is bright or overcast, anticipate an array of weather conditions throughout the year. Starting from the gorgeous spring flowers blooming to the hot and sun-soaked summer days, to the colorful autumn foliage, and the wintry landscapes during winter, Grand Marais, Minnesota offers a varied assortment of climate experiences throughout the year.