July in Cranbrook is the windiest, the sunniest, and the warmest month of the year. In July, the weather in Cranbrook is typically warm. Average daily high temperature in July is about 21 degrees above zero. On average, Cranbrook has 26 sunny, 3 rainy, and 2 partly cloudy days in July. The rains are usually light. July as well as August is considered the most comfortable time to visit Cranbrook.