July in Manistee is the sunniest and the warmest month of the year. In July, the weather in Manistee is typically warm. Average daily high temperature in July is about 23 degrees above zero. On average, Manistee has 21 sunny, 7 partly cloudy, and 3 rainy days in July. The rains are usually light. July as well as August is considered the most comfortable time to visit Manistee.