In May, the weather in Arcos de la Frontera is typically warm. Average daily high temperature in May is about 22 degrees above zero. On average, Arcos de la Frontera has 21 sunny, 5 rainy, and 5 partly cloudy days in May. The rains are usually light. May as well as June, September, and October is considered the most comfortable time to visit Arcos de la Frontera.