January in Trouville-sur-Mer is the windiest, the cloudiest, and the coldest month of the year. In January, the weather in Trouville-sur-Mer is typically cold. Average daily high temperature in January is about 7 degrees above zero. On average, Trouville-sur-Mer has 17 rainy, 7 partly cloudy, 6 cloudy, and 1 sunny day in January. The rains are usually heavy. January as well as February, March, April, and October is considered the most uncomfortable time to visit Trouville-sur-Mer.