June in Humacao is the cloudiest month of the year. In June, the weather in Humacao is typically hot. Average daily high temperature in June is about 29 degrees above zero. On average, Humacao has 24 rainy, 3 partly cloudy, 2 cloudy, and 1 sunny day in June. The rains are usually heavy. June as well as January, April, May, and July is considered the most uncomfortable time to visit Humacao.