UV Index in Japan

Japan has 1051 cities tracked for UV index data. Peak UV values across the country range from 11 to 14, with an average peak of 12. The country spans a wide latitude range, resulting in significant UV variation between northern and southern cities.

Parts of Japan experience extreme UV radiation that requires year-round sun protection. Browse the cities below to see detailed monthly UV data, sun safety recommendations, and the best times for outdoor activities in each location.