In December, the weather in Portoferraio is typically warm. Average daily high temperature in December is about 13 degrees above zero. On average, Portoferraio has 13 rainy, 10 sunny, 7 partly cloudy, and 1 cloudy day in December. The rains are usually heavy. December as well as January, February, and November is considered the most uncomfortable time to visit Portoferraio.