July in Rochdale is the warmest month of the year. In July, the weather in Rochdale is typically warm. Average daily high temperature in July is about 17 degrees above zero. On average, Rochdale 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 Rochdale.