January in Santiago de Cuba is the sunniest month of the year. In January, the weather in Santiago de Cuba is typically warm. Average daily high temperature in January is about 27 degrees above zero. On average, Santiago de Cuba has 29 sunny, 1 rainy, and 1 partly cloudy day in January. The rains are usually light. January as well as February, March, and December is considered the most comfortable time to visit Santiago de Cuba.