If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Lantsch-Lenz: The hottest months are usually July and August, with an average temperature of 11°C, while the coldest months are January and February, with an average of -6°C. The snowiest months in Lantsch-Lenz are April, May, November and January, with each month seeing an average of 13 cm of snowfall.