weather grand marais minnesotaAtmospheric conditions within Grand Marais, Minnesota is perpetually fluctuating. Whether it is bright or overcast, you can expect a variety of weather conditions throughout the year. From the gorgeous spring flowers blossoming to the hot and sun-soaked summertime days, to the scenic autumn foliage, and the wintry landscapes during winter, Grand Marais, Minnesota presents a wide range of climate experiences during the year.