August 2023 Historical Weather at Grand Marais Minnesota Weather within Grand Marais, Minnesota is always varying. Whether it's bright or overcast, you can expect a variety of climate patterns over the year. Beginning in the breathtaking springtime flowers blooming to the balmy and sun-soaked summertime days, to the colorful autumn foliage, and the wintry landscapes during winter, Grand Marais, Minnesota offers a wide assortment of climate experiences throughout the year.
