July in Cambridge is the rainiest and the warmest month of the year. In July, the weather in Cambridge is typically warm. Average daily high temperature in July is about 20 degrees above zero. On average, Cambridge has 21 rainy, 5 sunny, 3 partly cloudy, and 2 cloudy days in July. The rains are usually moderate. July as well as January, February, April, and June is considered the most uncomfortable time to visit Cambridge.