In October, the weather in Waikoloa is typically warm. Average daily high temperature in October is about 23 degrees above zero. On average, Waikoloa has 18 partly cloudy, 6 sunny, 5 cloudy, and 2 rainy days in October. The rains are usually light. October as well as January, February, April, and May is considered the most comfortable time to visit Waikoloa.