November in Carnac is the windiest month of the year. In November, the weather in Carnac is typically warm. Average daily high temperature in November is about 13 degrees above zero. On average, Carnac has 16 rainy, 6 cloudy, 5 sunny, and 3 partly cloudy days in November. The rains are usually heavy. November as well as January, February, and December is considered the most uncomfortable time to visit Carnac.