January in Bourbonnais is the snowiest, the cloudiest, and the most freezing month of the year. In January, the weather in Bourbonnais is typically freezing. Average daily high temperature in January is about 2 degrees below zero. On average, Bourbonnais has 17 cloudy, 8 snowy, 4 sunny, and 2 rainy days in January. The snowfalls are usually moderate.