May in Manacapuru is the rainiest month of the year. In May, the weather in Manacapuru is typically hot. Average daily high temperature in May is about 29 degrees above zero. On average, Manacapuru has 30 rainy and 1 sunny 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 Manacapuru.