UV Index in Nichinan, Japan

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors of Nichinan, Japan, where the sun shines bright and inviting. Being aware of UV levels not only helps in preventing sunburn but also plays a significant role in maintaining skin health over time. Nichinan's Cfa climate offers warm summers and mild winters, which can lead to increased UV exposure, especially during peak hours. With the UV Index peaking at a striking 12 around noon, it's essential to stay informed and take protective measures to enjoy the beautiful outdoors safely.

Hourly UV Index in Nichinan

As the day unfolds, the UV Index reaches its peak at 12 around noon, signaling a time to take extra precautions against sun exposure. Starting at a mild 2 at 7 AM, the index gradually climbs, hitting 10 by 11 AM and maintaining dangerously high levels until 1 PM. After that, it begins its descent, dropping to 4 by 4 PM and tapering off to 1 by 6 PM. This hourly data emphasizes the importance of protecting your skin during the midday hours when UV radiation is at its most intense. Stay safe and enjoy the sun wisely!

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