December in Mbuji-Mayi is the coldest month of the year. In December, the weather in Mbuji-Mayi is typically warm. Average daily high temperature in December is about 26 degrees above zero. On average, Mbuji-Mayi has 31 rainy days in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Mbuji-Mayi.