January in La Grande-Motte is the coldest month of the year. In January, the weather in La Grande-Motte is typically warm. Average daily high temperature in January is about 10 degrees above zero. On average, La Grande-Motte has 15 sunny, 10 partly cloudy, and 6 rainy days in January. The rains are usually light. January as well as February, November, and December is considered the most uncomfortable time to visit La Grande-Motte.