January in Castell-Platja d'Aro is the coldest month of the year. In January, the weather in Castell-Platja d'Aro is typically warm. Average daily high temperature in January is about 12 degrees above zero. On average, Castell-Platja d'Aro has 13 sunny, 8 partly cloudy, 7 rainy, and 3 cloudy days in January. The rains are usually moderate. January as well as February, March, April, and November is considered the most uncomfortable time to visit Castell-Platja d'Aro.