December in Hersonisos is the rainiest month of the year. In December, the weather in Hersonisos is typically warm. Average daily high temperature in December is about 14 degrees above zero. On average, Hersonisos has 12 rainy, 10 sunny, 8 partly cloudy, and 1 cloudy day in December. The rains are usually heavy. December as well as January and February is considered the most uncomfortable time to visit Hersonisos.