Grand Marais 55604 Weather 7 10 14 Day Weather MinnesotaAtmospheric conditions inside the heart of Grand Marais, Minnesota is always shifting. Whether it's sunny or overcast, you can expect a selection of climate conditions throughout the year. From the breathtaking springtime flowers blooming to the warm and sun-soaked summertime days, to the scenic autumn foliage, and the snow-covered landscapes during winter, Grand Marais, Minnesota provides a wide variety of weather experiences all through the year.