Weather is probably a major factor when you plan your trip to Tomsk, but bear 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 temperature of 15°C, while the coldest months are January and February, with an average of -14°C. The snowiest months in Tomsk are March, February, April and December, with each month seeing an average of 256 cm of snowfall.