If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Yaroslavl: The hottest months are usually July and August with an average temp of 62°F, while the coldest months are January and February with an average of 20°F. The snowiest months in Yaroslavl are February, March, January, and December, with each month seeing an average of 91 inches of snowfall.