August in Zihuatanejo is the cloudiest month of the year. In August, the weather in Zihuatanejo is typically hot. Average daily high temperature in August is about 28 degrees above zero. On average, Zihuatanejo has 24 rainy, 5 cloudy, and 2 sunny days in August. The rains are usually heavy. August as well as July and September is considered the most uncomfortable time to visit Zihuatanejo.