January in Karystos is the rainiest and the coldest month of the year. In January, the weather in Karystos is typically warm. Average daily high temperature in January is about 12 degrees above zero. On average, Karystos has 12 rainy, 9 sunny, 7 partly cloudy, and 3 cloudy days in January. The rains are usually heavy. January as well as February and December is considered the most uncomfortable time to visit Karystos.