December in Mwanza is the coldest month of the year. In December, the weather in Mwanza is typically warm. Average daily high temperature in December is about 24 degrees above zero. On average, Mwanza has 20 rainy, 7 sunny, and 4 partly cloudy days in December. The rains are usually moderate. December as well as February, March, April, and November is considered the most uncomfortable time to visit Mwanza.