UV Index in Nishiwaki, Japan

Last updated: July 2, 2025

In Nishiwaki, Japan, staying aware of the UV Index is crucial for protecting your skin and overall health. Understanding UV levels is essential, especially during peak hours when the sun’s rays can lead to sunburn and long-term skin damage. With a Cfa climate, Nishiwaki experiences distinct seasonal variations, but summer days often bring intense sunlight, elevating UV exposure risks. From mid-morning to early afternoon, when the UV Index peaks at a dangerous 12, residents and visitors alike must take precautions to enjoy the outdoors safely while safeguarding their skin’s health.

Hourly UV Index in Nishiwaki

The day's UV Index starts off mild, peaking at 2 by 7 AM, ideal for early morning strolls. As the sun rises, the index steadily climbs, hitting 4 by 8 AM and reaching 6 at 9 AM. By 10 AM, the intensity skyrockets to 9, and then the sun shines its brightest from 11 AM to 12 PM, where it peaks at an intense 12. The afternoon remains intense but slightly less so, with values of 11 at 1 PM and 9 at 2 PM, before tapering off to 6 at 3 PM. A gentle decline continues into the evening, bringing the index down to 3 by 4 PM, and finally settling at 1 by 6 PM, making the evening safe for outdoor activities. It's crucial to protect your skin during the peak UV 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	6	high	25 min
10:00	9	very high	15 min
11:00	11	extreme	10 min
12:00	12	extreme	10 min
13:00	11	extreme	10 min
14:00	9	very high	15 min
15:00	6	high	25 min
16:00	3	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 Nishiwaki

Throughout the year, UV radiation levels vary significantly, with the highest exposure typically occurring from May to August. During this period, the UV Index reaches extreme levels (11-12), resulting in a rapid burn time of only 10 minutes. Visitors and residents should take extra precautions, such as wearing sunscreen, protective clothing, and seeking shade during peak sun hours. March and April also present high-risk months with a UV Index of 8-10, where burn times decrease to 15 minutes. As the year progresses, the UV Index declines, with November and December offering moderate levels with burn times of 30 minutes. To ensure safety, it is essential to remain vigilant about UV exposure, especially during the summer months.

Monthly Maximum UV Index for Nishiwaki, Japan

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

The table above highlights how UV exposure in Nishiwaki 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.

Nishiwaki'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
Nishiwaki	4	6	8	10	11	11	12	12	10	7	5	3
Osaka UVI	4	6	8	11	11	11	12	11	10	7	5	3