Japan UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index12.1
- Avg Clouds93%
- Max Temp27.9 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in Japan, Indonesia 
will reach a high of 12.1 today. This means a extreme level of sun exposure. See our tips below to stay safe!
Last checked: 2025-09-17
Hourly Forecast Chart
Today's Safety Tips
Extreme danger! Avoid being in the sun, especially during midday. If you go out, cover up with clothing, a hat, and sunglasses, and use plenty of sunscreen.
Japan's UV Index
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.
Weather Seasons
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.
Japan's Climate
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.
Hourly UV Index Trend
See the UV index hour by hour for Japan. When the level is high, it's smart to find some shade.
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