April in Wahpeton is the windiest month of the year. In April, the weather in Wahpeton is typically warm. Average daily high temperature in April is about 12 degrees above zero. On average, Wahpeton has 9 sunny, 9 partly cloudy, 7 rainy, and 5 cloudy days in April. The rains are usually moderate. April as well as January, March, and November is considered the most uncomfortable time to visit Wahpeton.