UV Index in Nishiwaki, Japan

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents of Nishiwaki, Japan, where the sun's intensity can pose significant risks to skin health, especially during peak hours. With UV levels soaring to a maximum of 11 around noon, awareness of these fluctuations helps in preventing sunburn and protecting against long-term skin damage. Given Nishiwaki's Cfa climate, characterized by hot summers, it's essential to stay informed about UV exposure risks to enjoy outdoor activities safely and ensure the well-being of yourself and your loved ones.

Hourly UV Index in Nishiwaki

The UV Index for the day follows a dynamic trend, peaking during the midday hours. Starting at a modest 2 at 7:00 AM, the intensity gradually intensifies, reaching 4 by 8:00 AM. As the sun climbs higher, the index escalates significantly, hitting a striking 9 at 10:00 AM and reaching its zenith of 11 at 12:00 PM. After this peak, a gradual decline sets in, with the index dropping to 5 by 3:00 PM before tapering off to 1 by 5:00 PM. The day concludes with a UV Index of 0 by 7:00 PM, signaling a clear drop in potential UV exposure. It's a reminder to stay sun-smart, especially during the midday hours when the UV rays are at their strongest!

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	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 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