June in Kailua-Kona is the windiest and the cloudiest month of the year. In June, the weather in Kailua-Kona is typically warm. Average daily high temperature in June is about 23 degrees above zero. On average, Kailua-Kona has 15 partly cloudy, 11 cloudy, 2 rainy, and 2 sunny days in June. The rains are usually light.