Naha is the capital city of Okinawa Prefecture, the southernmost prefecture of Japan. As of 1 June 2019, the city has an estimated population of 317,405 and a population density of 7,939 persons per km2 (20,562 persons per sq. mi.). The total area is 39.98 km2
Naha has a humid subtropical climate (Köppen climate classification Cfa)—bordering on tropical rainforest climate (Köppen climate classification Af)—with hot summers and mild winters. Precipitation is abundant throughout the year; September is the wettest month and December is the driest. Naha has hot and humid summers with July and August being the city’s warmest months, exceeding an average high of 31 degrees Celsius (88 °F). Naha has warm winters, with average high temperatures in the coolest months of January and February, hovering around 19-20 degrees Celsius (66 to 68 °F) and average lows around 14-15 degrees Celsius (57 to 59 °F). The city sees a substantial amount of rainfall, averaging in excess of 2,000 mm (79 in) of rain per year.