April in Omaha is the rainiest month of the year. In April, the weather in Omaha is typically warm. Average daily high temperature in April is about 15 degrees above zero. On average, Omaha has 10 rainy, 9 partly cloudy, 8 sunny, and 3 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 Omaha.