UV Index in Nishiawakura, Japan

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors of Nishiawakura, Japan, where the climate falls under the Cfa zone, characterized by warm summers and mild winters. Awareness of UV levels helps protect against sunburn and long-term skin health issues, especially during peak midday hours when the index can reach as high as 12. As the UV index fluctuates throughout the day, peaking around noon, knowing when to seek shade or apply sunscreen is essential to enjoy the beautiful outdoors safely. With typical exposure risks heightened in the summer months, staying informed can make all the difference in preserving your skin.

Hourly UV Index in Nishiawakura

As the day unfolds, the UV Index climbs steadily, peaking at a striking 12 around noon, signaling a high risk for skin damage without protection. Early risers at 07:00 encounter a mild 2, but the intensity increases quickly, reaching 9 by 10:00 and a critical 11 by 11:00. From 12:00 to 13:00, the index holds its highest point at 12, making it essential to seek shade or apply sunscreen. After 13:00, the UV levels gradually decrease, dropping back to a manageable 4 by 16:00 and winding down to a safe 1 by 18:00. This hourly data serves as a reminder to take sun safety precautions, 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	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 Nishiawakura

Throughout the year, the UV Index experiences significant fluctuations, with the highest risk months typically from April to August, when values peak at 11-12 and fall into the extreme exposure category. Notably, July and August record the highest UV levels, necessitating diligent sun protection strategies. In contrast, the lower risk period spans from November to February, where the UV Index varies between 3 and 6, indicating moderate to high exposure. Visitors and residents are advised to take extra precautions during the high-risk months by seeking shade, wearing protective clothing, and applying sunscreen regularly to minimize the risk of skin damage.

Monthly Maximum UV Index for Nishiawakura, Japan

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

The table above highlights how UV exposure in Nishiawakura 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.

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