In April, the weather in Santiago de Compostela is typically warm. Average daily high temperature in April is about 16 degrees above zero. On average, Santiago de Compostela has 15 rainy, 7 sunny, 6 partly cloudy, and 2 cloudy days in April. The rains are usually heavy. April as well as January, February, March, and November is considered the most uncomfortable time to visit Santiago de Compostela.