January in Caldas da Rainha is the rainiest, the cloudiest, and the coldest month of the year. In January, the weather in Caldas da Rainha is typically warm. Average daily high temperature in January is about 13 degrees above zero. On average, Caldas da Rainha has 15 rainy, 9 sunny, and 7 partly cloudy days in January. The rains are usually heavy. January as well as February is considered the most uncomfortable time to visit Caldas da Rainha.