Weather will likely play an important role when you plan your trip to Harbor Springs, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July, with an average temperature of 18°C, while the coldest months are February and January, with an average of -4°C. The snowiest months in Harbor Springs are January, November, December and March, with each month seeing an average of 45 cm of snowfall.