August in Avilés is the warmest month of the year. In August, the weather in Avilés is typically warm. Average daily high temperature in August is about 22 degrees above zero. On average, Avilés has 16 sunny, 13 partly cloudy, and 2 rainy days in August. The rains are usually light. August as well as July and September is considered the most comfortable time to visit Avilés.