May in Saint Francois is the cloudiest month of the year. In May, the weather in Saint Francois is typically hot. Average daily high temperature in May is about 28 degrees above zero. On average, Saint Francois has 16 rainy, 9 sunny, 4 partly cloudy, and 2 cloudy days in May. The rains are usually heavy. May as well as August, September, October, and November is considered the most uncomfortable time to visit Saint Francois.