In January, the weather in Sant Antoni de Portmany is typically warm. Average daily high temperature in January is about 10 degrees above zero. On average, Sant Antoni de Portmany has 17 rainy, 7 sunny, 5 partly cloudy, and 2 cloudy days in January. The rains are usually heavy. January as well as February, March, April, and November is considered the most uncomfortable time to visit Sant Antoni de Portmany.