July in Dublin is the rainiest and the hottest month of the year. In July, the weather in Dublin is typically hot. Average daily high temperature in July is about 33 degrees above zero. On average, Dublin has 16 rainy, 8 sunny, 5 partly cloudy, and 2 cloudy days in July. The rains are usually heavy. July as well as June and August is considered the most uncomfortable time to visit Dublin.