UV Index
UV Index
Today's UV index in Yokohama, Japan 
will be up to 10.9, indicating a very 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: 2025-05-09
With a UV index of 10.9 in Yokohama, it's crucial to safeguard your skin from harmful UV rays. Protect yourself by minimizing sun exposure, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours.
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.
See the UV index hour by hour for Yokohama, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.