March in Brazzaville is the hottest month of the year. In March, the weather in Brazzaville is typically hot. Average daily high temperature in March is about 31 degrees above zero. On average, Brazzaville has 19 rainy, 7 cloudy, 4 partly cloudy, and 1 sunny day in March. The rains are usually heavy. March as well as January, February, April, and October is considered the most uncomfortable time to visit Brazzaville.