April in Detroit is the rainiest month of the year. In April, the weather in Detroit is typically warm. Average daily high temperature in April is about 12 degrees above zero. On average, Detroit has 14 rainy, 7 cloudy, 6 sunny, and 3 partly cloudy days in April. The rains are usually moderate. April as well as February, March, November, and December is considered the most uncomfortable time to visit Detroit.