April in West Chicago is the windiest month of the year. In April, the weather in West Chicago is typically warm. Average daily high temperature in April is about 15 degrees above zero. On average, West Chicago has 12 rainy, 9 sunny, 6 partly cloudy, and 3 cloudy days in April. The rains are usually heavy. April as well as January, February, March, and November is considered the most uncomfortable time to visit West Chicago.