January in Deby is the most freezing month of the year. In January, the weather in Deby is typically freezing. Average daily high temperature in January is about 12 degrees below zero. On average, Deby has 20 cloudy, 10 snowy, and 1 sunny day in January. The snowfalls are usually light. January as well as February, April, October, and December is considered the most uncomfortable time to visit Deby.