May in Caguas is the rainiest and the cloudiest month of the year. In May, the weather in Caguas is typically warm. Average daily high temperature in May is about 27 degrees above zero. On average, Caguas has 24 rainy and 7 sunny days in May. The rains are usually heavy. May as well as June, July, August, and September is considered the most uncomfortable time to visit Caguas.