September in Kalaupapa is the warmest month of the year. In September, the weather in Kalaupapa is typically warm. Average daily high temperature in September is about 26 degrees above zero. On average, Kalaupapa has 27 sunny, 2 partly cloudy, and 1 rainy day in September. The rains are usually light. September as well as January, April, May, and June is considered the most comfortable time to visit Kalaupapa.