December in Casablanca is the cloudiest month of the year. In December, the weather in Casablanca is typically warm. Average daily high temperature in December is about 17 degrees above zero. On average, Casablanca has 11 sunny, 9 partly cloudy, 8 rainy, and 3 cloudy days in December. The rains are usually moderate. December as well as January, February, March, and November is considered the most uncomfortable time to visit Casablanca.