July in Honolulu is the sunniest month of the year. In July, the weather in Honolulu is typically warm. Average daily high temperature in July is about 26 degrees above zero. On average, Honolulu has 25 sunny, 4 partly cloudy, and 2 rainy days in July. The rains are usually light. July as well as January, May, June, and August is considered the most comfortable time to visit Honolulu.