April in Sheridan is the windiest month of the year. In April, the weather in Sheridan is typically warm. Average daily high temperature in April is about 9 degrees above zero. On average, Sheridan has 10 rainy, 9 sunny, 7 partly cloudy, and 4 cloudy days in April. The rains are usually moderate. April as well as January, February, March, and May is considered the most uncomfortable time to visit Sheridan.