April in Copenhagen is the sunniest month of the year. In April, the weather in Copenhagen is typically warm. Average daily high temperature in April is about 11 degrees above zero. On average, Copenhagen has 10 rainy, 10 sunny, 7 partly cloudy, and 3 cloudy days in April. The rains are usually light. April as well as January, February, March, and October is considered the most uncomfortable time to visit Copenhagen.