You'll likely spend much of your trip indoors, but if you're planning to venture beyond the casino, taking a look at local weather data can help you. 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.