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Nagasaki UV Index Today

Day Summary

The UV index in Nagasaki, Japan Flag of Japan will reach a high of 10 today. This means a veryhigh level of sun exposure. See our tips below to stay safe!

Last checked: 2025-08-01

Hourly Forecast Chart

Today's Safety Tips

The risk is very high. It's best to stay out of the sun between 10 a.m. and 4 p.m. If you must be outside, wear protective clothing and apply sunscreen often.

Nagasaki's UV Index

The UV index in Nagasaki varies throughout the year, reaching high levels in summer months, especially June through August, and lower levels in winter, from November to February. UV exposure is strongest during midday hours.

Weather Seasons

UV index

Nagasaki experiences warm, humid summers with frequent rain, especially during the rainy season in June and July. Winters are mild and relatively dry, with occasional cold spells but rarely snow. Spring and autumn have comfortable temperatures and less rain.

Nagasaki's Climate

Compared to other parts of Japan, Nagasaki is milder in winter and warmer in summer due to its coastal location. It has more rainfall than northern Japan but less than tropical Okinawa. Neighboring South Korea generally has colder winters.

Hourly UV Index Trend

See the UV index hour by hour for Nagasaki. When the level is high, it's smart to find some shade.

Disclaimer

* The information on this page about the UV index in Nagasaki is for educational purposes only. It is not a substitute for professional medical advice. Always consult a doctor for any health concerns.