December in Tomaszow Mazowiecki is the windiest month of the year. In December, the weather in Tomaszow Mazowiecki is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Tomaszow Mazowiecki has 15 cloudy, 11 rainy, 3 snowy, and 2 sunny days in December. The rains are usually light. December as well as February, March, April, and November is considered the most uncomfortable time to visit Tomaszow Mazowiecki.