UV Index
Yokohama UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index7.3
- Avg Clouds98%
- Max Temp34 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in Yokohama, Japan 
will reach a high of 7.3 today. This means a high level of sun exposure. See our tips below to stay safe!
Last checked: 2025-08-22
Hourly Forecast Chart
Today's Safety Tips
Be careful! The sun's rays are strong. Try to stay in the shade between 10 a.m. and 4 p.m. Wear a hat, sunglasses, and reapply SPF 30+ sunscreen every 2 hours.
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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