January in Cognac is the coldest month of the year. In January, the weather in Cognac is typically cold. Average daily high temperature in January is about 8 degrees above zero. On average, Cognac has 13 rainy, 7 sunny, 7 partly cloudy, and 4 cloudy days in January. The rains are usually heavy. January as well as February, November, and December is considered the most uncomfortable time to visit Cognac.