UV Index in Nichinan, Japan

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors of Nichinan, Japan, where the sun’s intensity can significantly impact your skin health. With peak UV levels soaring to 12 during the midday hours, being aware of these levels is essential for sunburn prevention and long-term skin damage mitigation. Nestled in a Cfa climate zone, Nichinan experiences warm summers and mild winters, making it essential to stay informed about UV exposure risks. By monitoring the UV Index, you can enjoy the beautiful outdoors while safeguarding your skin against harmful ultraviolet rays.

Hourly UV Index in Nichinan

The UV Index begins its rise at 7:00 AM with a low of 2, gradually climbing to a moderate 3 by 8:00 AM. By 9:00 AM, it reaches 6, but it's at 10:00 AM when the sun truly bears down, peaking at a high of 9. The intensity continues to soar, hitting a maximum of 12 at 12:00 PM, making it the most UV-active hour of the day. From there, it subtly declines, dropping back to 11 at 1:00 PM, and 9 at 2:00 PM. The afternoon brings relief as the index falls to 6 by 3:00 PM and continues to decrease, settling at 4 by 4:00 PM. As the day winds down, the UV Index dips to 2 by 5:00 PM and further to a safe 1 by 6:00 PM and stays consistent through 7:00 PM. Stay sun-smart and avoid peak UV hours for your skin's safety!

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	3	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	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 Nichinan

Throughout the year, the UV Index experiences notable fluctuations, peaking during the summer months. The highest risk months are May, June, July, and August, when the UV Index reaches extreme levels, with a burn time of just 10 minutes. This period requires increased caution, as exposure to direct sunlight can lead to severe skin damage. Transitioning into spring, March and April also present very high UV levels, with a burn time of only 15 minutes. Conversely, the winter months of January and December show moderate to low UV exposure, with burn times of 30 minutes. It is crucial for visitors and residents to protect themselves adequately during high UV periods by wearing sunscreen, hats, and protective clothing, and seeking shade whenever possible.

Monthly Maximum UV Index for Nichinan, Japan

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

The table above highlights how UV exposure in Nichinan 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.

Nichinan'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
Nichinan	5	6	10	10	12	12	12	13	11	8	6	4