UV Index in Uto, Japan

Last updated: August 1, 2025

In Uto, Japan, being aware of the UV Index is crucial for maintaining healthy skin and preventing sunburn. Understanding UV levels not only helps residents and visitors protect themselves from harmful rays but also fosters a general awareness of skin health. With a Cfa climate characterized by warm summers, Uto experiences significant UV exposure, particularly during midday when the index peaks at an impressive 13. This knowledge empowers you to enjoy the beautiful outdoors safely, ensuring that your adventures are both fun and sun-smart.

Hourly UV Index in Uto

The UV Index exhibits a dynamic range throughout the day, starting at a mild level of 2 at 7:00 AM. As the sun rises higher, it peaks at an intense 13 by 12:00 PM, indicating a significant risk of harm from unprotected sun exposure. From there, it begins a gentle decline, dropping to 10 at 2:00 PM and gradually tapering off to 1 by the evening hours. The highest figures, 11 and 13, underscore the importance of applying sunscreen and wearing protective clothing during midday. As the day unfolds, be sure to take precautions during peak UV hours to ensure your safety in the sun!

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	1	low	45 min
08:00	3	moderate	30 min
09:00	5	moderate	30 min
10:00	8	very high	15 min
11:00	11	extreme	10 min
12:00	12	extreme	10 min
13:00	12	extreme	10 min
14:00	10	very high	15 min
15:00	7	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 Uto

Throughout the year, the UV Index shows notable seasonal changes, with the highest risk occurring from March to September. During these months, the index reaches extreme levels, particularly peaking in August with a UV Index of 13. Visitors and residents should exercise caution during high-risk months and, ideally, limit direct sun exposure to less than 10 minutes daily between April and September. In contrast, the UV Index is relatively moderate in January and December, with burn times of 30 minutes. To minimize the risk of skin damage, it is essential to apply sunscreen, wear protective clothing, and seek shade, especially during peak hours from late morning to early afternoon.

Monthly Maximum UV Index for Uto, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Uto. 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 Uto, 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 Uto UV Index with Other Japan Cities

The table above highlights how UV exposure in Uto 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.

Uto'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
Osaka UVI	4	6	8	11	11	11	12	11	10	7	5	3
Uto	5	6	9	11	12	12	12	13	11	8	6	4