January in Ibiza is the coldest month of the year. In January, the weather in Ibiza is typically warm. Average daily high temperature in January is about 15 degrees above zero. On average, Ibiza has 14 sunny, 9 partly cloudy, 6 rainy, and 2 cloudy days in January. The rains are usually light. January as well as February, November, and December is considered the most uncomfortable time to visit Ibiza.