If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Mudanjiang: The hottest months are usually July and August with an average temp of 65°F, while the coldest months are January and December with an average of 9°F. The snowiest months in Mudanjiang are November, January, December, and March, with each month seeing an average of 24 inches of snowfall.