UV Index
UV Index
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Today's UV index in Nagasaki, Japan 
will be up to 4.9, 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 4.9 in Nagasaki, 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.
Nagasaki's weather is characterized by high UV indexes, particularly during the summer months, with levels often reaching extreme highs. This is due to its location on the Japanese island of Kyushu, which receives direct sunlight and has minimal atmospheric obstruction.
The city experiences four distinct seasons, with mild winters and hot, humid summers. Spring and autumn are mild, with temperatures ranging from 10°C to 20°C. Compared to other Japanese cities, Nagasaki's climate is relatively warm and humid, influenced by its proximity to the Asian continent.
Nagasaki's climate is similar to that of other cities in the Kyushu region, such as Fukuoka and Sasebo. It is also comparable to the climate of neighboring countries, such as South Korea and Taiwan, which share similar latitudinal and coastal characteristics.