March in Thessaloniki is the rainiest month of the year. In March, the weather in Thessaloniki is typically warm. Average daily high temperature in March is about 13 degrees above zero. On average, Thessaloniki has 14 sunny, 9 partly cloudy, and 8 rainy days in March. The rains are usually heavy. March as well as January, February, and December is considered the most uncomfortable time to visit Thessaloniki.