UV Index in Obu, Japan

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors in Obu, Japan, where the warm, temperate climate can pose significant sun exposure risks. Being aware of UV levels not only helps in preventing sunburn but also plays a vital role in protecting your long-term skin health. With daytime UV Index values peaking at a high of 11 between 12:00 PM and 1:00 PM, residents should be particularly cautious during those hours. The typical warm weather in Obu heightens the risk of harmful UV radiation, making this knowledge essential for enjoying the outdoors safely. Stay informed, stay protected, and make the most of your time in the sun!

Hourly UV Index in Obu

As the day unfolds, the UV Index rises dramatically, peaking at 11 at noon. Starting from a mild 2 at 7:00 AM, the intensity escalates as sunlight strengthens. By 10:00 AM, the UV Index hits 9, a clear indication to seek shade and protect your skin. The intensity reaches a maximum of 10 at 11:00 AM and holds steady until 1:00 PM, when it slightly dips to 10. After the midday peak, the UV Index begins to decline, dropping to 3 by 4:00 PM and eventually tapering off to 0 by 7:00 PM. This hour-by-hour progression serves as a vital reminder of how midday sun exposure can significantly impact skin health.

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	4	moderate	30 min
09:00	6	high	25 min
10:00	9	very high	15 min
11:00	10	very high	15 min
12:00	11	extreme	10 min
13:00	10	very high	15 min
14:00	7	high	25 min
15:00	5	moderate	30 min
16:00	3	moderate	30 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Obu

Throughout the year, UV exposure varies significantly, peaking during the summer months. High-risk months for UV exposure are from March to August, when the UV Index reaches its maximum levels of 10 to 11 and the burn time is as brief as 10 minutes. Notably, May through August features extreme exposure, requiring diligent sun protection practices. As the year transitions into fall, September to November sees a decrease in UV levels, with October still posing a moderate risk. To ensure safety, visitors and residents are advised to wear protective clothing, use sunscreen, and seek shade during the peak sun hours, especially from late spring through summer when the threat of sunburn is greatest.

Monthly Maximum UV Index for Obu, Japan

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

The table above highlights how UV exposure in Obu 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.

Obu'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
Obu	4	6	8	10	11	11	11	11	10	7	5	3
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