In May, the weather in Brazzaville is typically hot. Average daily high temperature in May is about 29 degrees above zero. On average, Brazzaville has 23 rainy, 4 sunny, 3 partly cloudy, and 1 cloudy day in May. The rains are usually heavy. May as well as January, February, March, and April is considered the most uncomfortable time to visit Brazzaville.