UV Index
UV Index
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Today's UV index in Hiroshima, Japan 
will be up to 4.3, indicating a moderate level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
With a UV index reaching up to 4.3 in Hiroshima, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
Hiroshima, Japan experiences a humid subtropical climate, characterized by hot summers and mild winters. The UV index is typically high during the summer months, often reaching extreme levels.
The city has four distinct seasons, with summer lasting from June to September and winter from December to February. Spring, from March to May, is mild and pleasant, while autumn, from September to November, is cool and comfortable.
Compared to other cities in the region, Hiroshima's climate is similar to that of Osaka and Nagoya. However, it has a slightly cooler winter than cities in southern Japan, such as Fukuoka. In contrast, neighboring countries like Korea and China have more extreme temperature fluctuations.