December in Gammarth is the cloudiest month of the year. In December, the weather in Gammarth is typically warm. Average daily high temperature in December is about 15 degrees above zero. On average, Gammarth has 14 partly cloudy, 11 sunny, and 6 rainy days in December. The rains are usually light. December as well as January and February is considered the most uncomfortable time to visit Gammarth.