January in Gytheio is the cloudiest and the coldest month of the year. In January, the weather in Gytheio is typically warm. Average daily high temperature in January is about 10 degrees above zero. On average, Gytheio has 12 rainy, 9 sunny, 6 partly cloudy, and 4 cloudy days in January. The rains are usually heavy. January as well as February, March, and December is considered the most uncomfortable time to visit Gytheio.