In December, the weather in Ascoli Piceno is typically cold. Average daily high temperature in December is about 7 degrees above zero. On average, Ascoli Piceno has 11 sunny, 10 partly cloudy, 9 rainy, and 1 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 Ascoli Piceno.