May in Boca Chica is the rainiest and the cloudiest month of the year. In May, the weather in Boca Chica is typically hot. Average daily high temperature in May is about 29 degrees above zero. On average, Boca Chica has 23 rainy and 8 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 Boca Chica.