Weather will likely play an important role when you plan your trip to Ellmau, and keep 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 temp of 59°F, while the coldest months are January and February with an average of 30°F. The snowiest months in Ellmau are December, January, November, and February, with each month seeing an average of 5 inches of snowfall.