Because of its location on an island at the northern rim of the tropics, Haikou benefits from a monsoon tropical climate. Average temperatures range from 17.2° C in January to 28.4° C in July. Average annual sunlight in Haikou is about 2,600 hours, while average annual rainfall is about 1,300 mm. Visitors to the city can expect pleasant conditions and clear skies most of the year.