Grand Marais Minnesota June 2023 Weather ForecastClimate inside the heart of Grand Marais, Minnesota is always varying. Whether it's fair or cloudy, expect a range of climate conditions over the year. Beginning in the gorgeous springtime flowers blossoming to the balmy and sun-soaked summer days, to the scenic autumn foliage, and the wintry landscapes during winter, Grand Marais, Minnesota presents a varied range of weather experiences all through the year.