January in Concarneau is the rainiest and the windiest month of the year. In January, the weather in Concarneau is typically cold. Average daily high temperature in January is about 9 degrees above zero. On average, Concarneau has 23 rainy, 5 sunny, and 3 cloudy days in January. The rains are usually heavy. January as well as February, March, November, and December is considered the most uncomfortable time to visit Concarneau.