UV Index in Kashiwazaki, Japan

Last updated: August 1, 2025

Awareness of the UV Index in Kashiwazaki, Japan is essential for safeguarding your skin and overall health. As sun exposure varies throughout the day, understanding UV levels can help prevent painful sunburns and long-term skin damage. Kashiwazaki, with its Cfa climate, typically experiences high UV exposure, especially during the mid-day hours, peaking at 11 around noon. By staying informed about the UV Index, you can take necessary precautions to enjoy the beautiful outdoor activities this vibrant region has to offer while keeping your skin protected.

Hourly UV Index in Kashiwazaki

The UV Index exhibits a dynamic pattern throughout the day, peaking impressively at 12:00 PM with a striking value of 11, indicating a very high risk of harm from unprotected sun exposure. As early as 9:00 AM, the index jumps to 7, suggesting it’s time to start applying sunscreen. The intensity swells to 10 by 11:00 AM, urging sun safety measures. After reaching its zenith, the index gradually declines, dipping to 5 by 3:00 PM and eventually settling at a low of 0 by 7:00 PM. With these fluctuations, it’s crucial to be sun-smart, especially during peak hours!

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	7	high	25 min
10:00	9	very high	15 min
11:00	11	extreme	10 min
12:00	11	extreme	10 min
13:00	10	very high	15 min
14:00	8	very high	15 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 Kashiwazaki

The UV Index exhibits significant seasonal variation, peaking during the summer months. High-risk months, particularly from March to August, see the UV Index reach extremes, with levels of 8 to 11 categorized as very high to extreme, resulting in quick burn times ranging from 10 to 15 minutes. Visitors and residents should take precautions during these months by seeking shade, wearing protective clothing, and applying sunscreen to minimize sun exposure. The UV levels decrease from September to November, but caution is still advised, especially with a moderate UV Index in the cooler months. Stay informed and protect your skin to enjoy the outdoors safely year-round.

Monthly Maximum UV Index for Kashiwazaki, Japan

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

The table above highlights how UV exposure in Kashiwazaki 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.

Kashiwazaki'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
Kashiwazaki	3	5	8	9	10	11	11	11	9	6	5	3
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