January in Saint-Denis is the rainiest, the windiest, and the cloudiest month of the year. In January, the weather in Saint-Denis is typically warm. Average daily high temperature in January is about 26 degrees above zero. On average, Saint-Denis has 19 rainy, 5 sunny, 4 cloudy, and 3 partly cloudy days in January. The rains are usually heavy. January as well as February, March, and December is considered the most uncomfortable time to visit Saint-Denis.