February in Carnac is the coldest month of the year. In February, the weather in Carnac is typically cold. Average daily high temperature in February is about 9 degrees above zero. On average, Carnac has 9 rainy, 9 partly cloudy, 7 sunny, and 4 cloudy days in February. The rains are usually moderate. February as well as January, November, and December is considered the most uncomfortable time to visit Carnac.