UV Index in Nagato, Japan

Last updated: June 2, 2025

In Nagato, Japan, awareness of the UV Index is essential for maintaining skin health and preventing sunburn. Understanding UV levels is crucial as exposure can lead to immediate and long-term skin damage, including increased risks of skin cancer. With a Cfa climate characterized by warm summers and a significant intensity of sunlight, Nagato experiences concerning UV exposure, particularly between 10 AM and 2 PM, when indices peak at 11. Being informed about daily UV levels empowers residents and visitors alike to take necessary precautions and enjoy the beautiful outdoors safely.

Hourly UV Index in Nagato

The UV Index today showcases a dynamic rise and fall throughout the hours, peaking at 11 from 12:00 PM to 1:00 PM. Starting from a gentle 2 at 7:00 AM, it climbs steadily, reaching 10 by 11:00 AM. As the sun approaches its zenith, the index hits its maximum of 11, indicating a high risk of harm from unprotected sun exposure. After this peak, the index begins its descent, tapering down to 6 at 3:00 PM before declining further to 2 by 5:00 PM. As evening sets in, it settles at a mild 1 from 6:00 PM onward, reminding us to take precautions when basking in the midday sun but allowing for safer outdoor activities as daylight fades.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
Time	UVI	Category	Time to Burn
07:00	2	low	45 min
08:00	3	moderate	30 min
09:00	6	high	25 min
10:00	8	very high	15 min
11:00	10	very high	15 min
12:00	11	extreme	10 min
13:00	11	extreme	10 min
14:00	9	very high	15 min
15:00	6	high	25 min
16:00	4	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Nagato

As the seasons change, so do UV levels, with notable high-risk months spanning from March to August when the UV Index reaches very high to extreme levels, significantly lowering burn times to just 10-15 minutes. Visitors and residents alike should be particularly vigilant during these months, taking precautions such as wearing sunblock, protective clothing, and seeking shade to minimize skin damage. From September to November, the UV Index decreases, entering the moderate to high exposure categories, where burn times gradually increase to 25-30 minutes. Therefore, while UV exposure is less intense in the colder months, it remains important to stay informed and practice sun safety year-round, especially during the peak summer months.

Monthly Maximum UV Index for Nagato, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Nagato. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Nagato, based on information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

Compare Nagato UV Index with Other Japan Cities

The table above highlights how UV exposure in Nagato compares to other major locations across Japan. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Nagato's solar exposure compared to other cities in Japan. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sapporo UVI	2	3	6	7	9	9	9	10	8	5	3	2
Yokohama UVI	3	5	8	9	11	11	11	11	10	7	5	4
Tokyo UVI	3	5	8	9	11	11	11	11	10	7	5	4
Nagoya UVI	4	6	8	10	11	11	11	11	10	7	5	3
Nagato	4	5	8	10	11	11	12	12	10	7	5	3
Osaka UVI	4	6	8	11	11	11	12	11	10	7	5	3