December in Pico Island is the rainiest and the windiest month of the year. In December, the weather in Pico Island is typically warm. Average daily high temperature in December is about 17 degrees above zero. On average, Pico Island has 24 rainy, 3 sunny, 3 cloudy, and 1 partly cloudy day in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Pico Island.