August in Boca Chica is the hottest month of the year. In August, the weather in Boca Chica is typically hot. Average daily high temperature in August is about 29 degrees above zero. On average, Boca Chica has 27 rainy, 2 sunny, and 2 partly cloudy days in August. The rains are usually heavy. August as well as April, May, June, and July is considered the most uncomfortable time to visit Boca Chica.