Honolulu is the capital and largest city of Hawaii, located on the island of Oahu. As the main gateway to Hawaii and a major Pacific hub, Honolulu has a diverse culture and economy. The population of Honolulu was over 390,000 according to the 2010 census, and the city has a tropical climate with rainfall mainly in the winter and over 278 sunny days per year on average. Honolulu is a financial and business center and the largest city and airport in Hawaii, contributing greatly to the state's large tourism industry.