August in Tampico is the hottest month of the year. In August, the weather in Tampico is typically hot. Average daily high temperature in August is about 31 degrees above zero. On average, Tampico has 20 rainy, 8 sunny, and 3 partly cloudy days in August. The rains are usually heavy. August as well as June, July, and September is considered the most uncomfortable time to visit Tampico.