UV Index
UV Index
Today's UV index in Hiroshima, Japan 
will be up to 9.4, 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 9.4 in Hiroshima, 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.
The UV index in Hiroshima varies through the year, typically reaching high levels during summer months, especially in July and August. It can sometimes be moderate to low during winter and early spring seasons.
Hiroshima experiences four distinct seasons with hot, humid summers and mild winters. Spring brings cherry blossoms and moderate temperatures, while autumn has pleasant, cooler weather and colorful leaves. The rainy season happens in early summer.
Compared to other parts of Japan, Hiroshima's climate is milder and less snowy than northern areas like Hokkaido. It is warmer and wetter than many inland regions. Nearby countries like South Korea have similar seasonal patterns but can be colder in winter.
See the UV index hour by hour for Hiroshima, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.