April in Mwanza is the rainiest and the cloudiest month of the year. In April, the weather in Mwanza is typically warm. Average daily high temperature in April is about 25 degrees above zero. On average, Mwanza has 25 rainy, 4 sunny, and 1 cloudy day in April. The rains are usually heavy. April as well as February, March, November, and December is considered the most uncomfortable time to visit Mwanza.