Grand Marais Minnesota 14 Day Weather 55604 WeatherWXcomClimate inside Grand Marais, Minnesota is consistently fluctuating. No matter if it's sunny or overcast, look forward to an array of climate patterns over the year. Starting from the gorgeous springtime flowers blossoming to the balmy and sun-filled summertime days, to the scenic fall foliage, and the wintry landscapes in winter, Grand Marais, Minnesota presents a varied variety of climate experiences throughout the year.