December in Echirolles is the windiest month of the year. In December, the weather in Echirolles is typically cold. Average daily high temperature in December is about 3 degrees above zero. On average, Echirolles has 18 rainy, 8 sunny, 4 partly cloudy, 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 Echirolles.