In December, the weather in Sestri Levante is typically warm. Average daily high temperature in December is about 10 degrees above zero. On average, Sestri Levante has 11 sunny, 11 partly cloudy, 8 rainy, and 1 cloudy day in December. The rains are usually moderate. December as well as January, February, March, and November is considered the most uncomfortable time to visit Sestri Levante.