April in Dublin is the sunniest month of the year. In April, the weather in Dublin is typically warm. Average daily high temperature in April is about 10 degrees above zero. On average, Dublin has 14 rainy, 7 cloudy, 5 sunny, and 4 partly 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 Dublin.