August in Caldas da Rainha is the warmest month of the year. In August, the weather in Caldas da Rainha is typically warm. Average daily high temperature in August is about 24 degrees above zero. On average, Caldas da Rainha has 29 sunny and 2 partly cloudy days in August. August as well as June, July, and September is considered the most comfortable time to visit Caldas da Rainha.