August in Kapolei is the sunniest month of the year. In August, the weather in Kapolei is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Kapolei has 24 sunny, 4 partly cloudy, 2 rainy, and 1 cloudy day in August. The rains are usually light. August as well as April, May, June, and July is considered the most comfortable time to visit Kapolei.