January in Poros is the cloudiest and the coldest month of the year. In January, the weather in Poros is typically warm. Average daily high temperature in January is about 12 degrees above zero. On average, Poros has 12 sunny, 11 partly cloudy, 6 rainy, and 2 cloudy days in January. The rains are usually light. January as well as February and December is considered the most uncomfortable time to visit Poros.