UV Index
Yokohama UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index11.6
- Avg Clouds29%
- Max Temp33.5 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in Yokohama, Japan 
will reach a high of 11.6 today. This means a extreme level of sun exposure. See our tips below to stay safe!
Last checked: 2025-08-01
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.
Yokohama's UV Index
Yokohama's UV index is highest in summer, reaching levels around 7 to 9, indicating strong sun exposure. In spring and autumn, it ranges between 3 and 6, and in winter, it is usually low, around 1 to 2. Yokohama experiences four distinct seasons with mild, humid summers and cool winters. Spring brings cherry blossoms and moderate temperatures, while autumn offers pleasant weather and colorful leaves. Rainfall peaks during June and September. Compared to other parts of Japan, Yokohama has a milder climate than northern regions like Hokkaido but is warmer and more humid than areas in western Japan. Its coastal location keeps temperatures moderate compared to inland cities.
Hourly UV Index Trend
See the UV index hour by hour for Yokohama. When the level is high, it's smart to find some shade.
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