Hawaii is the only archipelagic state in the United States. It consists of 132 islands in the central Pacific Ocean. The land area is 167,700 square kilometers. Hawaii is an island-type climate with monsoon regulation throughout the year, and the annual temperature is about 26-31 degrees Celsius. Located at the "crossroads" of the Pacific Ocean, it is a sea and air transport hub between Asia, the United States and Oceania, and has an important strategic position. Honolulu is the relay and important port of the Pacific route.