January in Zakynthos is the rainiest, the windiest, the cloudiest, and the coldest month of the year. In January, the weather in Zakynthos is typically warm. Average daily high temperature in January is about 14 degrees above zero. On average, Zakynthos has 18 rainy, 10 sunny, 2 partly cloudy, and 1 cloudy day in January. The rains are usually heavy. January as well as February and December is considered the most uncomfortable time to visit Zakynthos.