You can plan your beach trip with a look at weather throughout the year in Weissbach an der Alpenstrasse: The hottest months are usually July and August with an average temp of 60°F, while the coldest months are January and February with an average of 31°F. The snowiest months in Weissbach an der Alpenstrasse are December, January, November, and February, with each month seeing an average of 5 inches of snowfall.