Grand Marais Minnesota June 2023 Weather ForecastClimate at Grand Marais, Minnesota is always fluctuating. Whether fair or overcast, anticipate a range of climate conditions during the year. Starting from the breathtaking springtime flowers blooming to the hot and sun-filled summer days, to the colorful fall foliage, and the wintry landscapes during winter, Grand Marais, Minnesota provides a varied variety of climate experiences during the year.