May in Bar-le-Duc is the rainiest month of the year. In May, the weather in Bar-le-Duc is typically warm. Average daily high temperature in May is about 17 degrees above zero. On average, Bar-le-Duc has 19 rainy, 8 sunny, 3 partly cloudy, and 1 cloudy day in May. The rains are usually moderate. May as well as January, February, March, and November is considered the most uncomfortable time to visit Bar-le-Duc.