December in Sancti Spiritus is the sunniest month of the year. In December, the weather in Sancti Spiritus is typically warm. Average daily high temperature in December is about 27 degrees above zero. On average, Sancti Spiritus has 22 sunny, 7 partly cloudy, and 2 rainy days in December. The rains are usually light. December as well as January, February, and March is considered the most comfortable time to visit Sancti Spiritus.