June Weather in Grand Marais Minnesota United StatesAtmospheric conditions in Grand Marais, Minnesota is constantly fluctuating. Whether it's clear or overcast, expect an array of climate conditions during the year. From the breathtaking springtime flowers blossoming to the balmy and sun-soaked summertime days, to the colorful autumn foliage, and the snow-covered landscapes during winter, Grand Marais, Minnesota offers a diverse selection of climate experiences all through the year.