When you're traveling with pets, keeping tabs on the weather can help you make the trip more safe and fun for everyone. The hottest months are usually July and August with an average temp of 47°F, while the coldest months are January and February with an average of 17°F. The snowiest months in St. Valentin auf der Haide are April, May, November, and January, with each month seeing an average of 5 inches of snowfall.