Weather is probably a major factor when you plan your trip to Tomsk, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and June with an average temp of 60°F, while the coldest months are January and February with an average of 6°F. The snowiest months in Tomsk are March, February, April, and December, with each month seeing an average of 101 inches of snowfall.