April in Bourbonnais is the windiest month of the year. In April, the weather in Bourbonnais is typically warm. Average daily high temperature in April is about 15 degrees above zero. On average, Bourbonnais has 13 rainy, 7 sunny, 5 cloudy, and 5 partly cloudy days in April. The rains are usually heavy. April as well as February, March, and December is considered the most uncomfortable time to visit Bourbonnais.