Weather will likely play an important role when you plan your trip to Mudanjiang, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 18°C, while the coldest months are January and December, with an average of -13°C. The snowiest months in Mudanjiang are November, January, December and March, with each month seeing an average of 60 cm of snowfall.