April in Tomsk is the rainiest month of the year. In April, the weather in Tomsk is typically cold. Average daily high temperature in April is about 6 degrees above zero. On average, Tomsk has 18 rainy, 11 cloudy, and 1 sunny day in April. The rains are usually moderate. April as well as January, February, October, and December is considered the most uncomfortable time to visit Tomsk.