Weather will likely play an important role when you plan your trip to Mulan County, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August with an average temp of 67°F, while the coldest months are January and February with an average of 8°F. The snowiest months in Mulan County are November, January, December, and March, with each month seeing an average of 54 inches of snowfall.