If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Vaz-Obervaz: 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 Vaz-Obervaz are March, April, May and November, with each month seeing an average of 41 cm of snowfall.