June weather Summer 2023 Grand Marais MNWeather inside Grand Marais, Minnesota is perpetually changing. Whether it's clear or cloudy, anticipate a selection of weather conditions throughout the year. From the gorgeous springtime flowers blossoming to the hot and sun-filled summer days, to the colorful fall foliage, and the snow-covered landscapes during winter, Grand Marais, Minnesota offers a diverse assortment of climate experiences during the year.