July in Boca Chica is the hottest month of the year. In July, the weather in Boca Chica is typically hot. Average daily high temperature in July is about 30 degrees above zero. On average, Boca Chica has 21 rainy and 10 sunny days in July. The rains are usually heavy. July as well as May, June, August, and September is considered the most uncomfortable time to visit Boca Chica.