July in Galway is the warmest month of the year. In July, the weather in Galway is typically warm. Average daily high temperature in July is about 16 degrees above zero. On average, Galway has 26 rainy, 3 sunny, and 2 cloudy days in July. The rains are usually heavy. July as well as January, February, March, and April is considered the most uncomfortable time to visit Galway.