January in Boncourt is the snowiest and the coldest month of the year. In January, the weather in Boncourt is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Boncourt has 10 cloudy, 9 rainy, 6 sunny, 5 partly cloudy, and 1 snowy day in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Boncourt.