UV Index
UV Index
Today's UV index in Japan, Indonesia 
will be up to 7.1, indicating a high level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-08
With Japan's UV index reaching 7.1, protect your skin from harm by staying in shade, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours, especially between 10 a.m. and 4 p.m. when UV rays are strongest.
Japan's UV index varies widely, reaching very high levels in summer, especially in southern areas, while winter UV levels can be low. Indonesia generally has a high UV index year-round due to its tropical location near the equator.
Japan has four distinct seasons: cold, snowy winters; warm, rainy springs; hot, humid summers; and cool, colorful autumns. Indonesia, located in the tropics, experiences a wet season with heavy rain and a dry season with less rain but consistent warm temperatures.
Compared to other East Asian countries, Japan has more temperature variation and seasonal changes. Indonesia's weather is similar to nearby Southeast Asian countries like Malaysia and the Philippines, all having tropical climates with wet and dry seasons.
See the UV index hour by hour for Japan, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.