April in Dublin is the rainiest month of the year. In April, the weather in Dublin is typically warm. Average daily high temperature in April is about 16 degrees above zero. On average, Dublin has 14 rainy, 7 sunny, 5 partly cloudy, and 4 cloudy days in April. The rains are usually heavy. April as well as January, February, March, and December is considered the most uncomfortable time to visit Dublin.