UV Index in Yamada, Japan

Last updated: May 3, 2025

Understanding the UV Index in Yamada, Japan is crucial for residents and visitors alike, as it plays a significant role in promoting sunburn prevention and safeguarding skin health. With the climate here characterized as Cfb (Oceanic), Yamada experiences varying UV exposure throughout the day, peaking at a maximum index of 9 around noon. By recognizing daily UV levels, you can take proactive measures to protect yourself from harmful radiation, especially during those high-risk hours, ensuring enjoyable outdoor activities without compromising your health. Stay informed and stay safe under the sun!

Hourly UV Index in Yamada

Throughout the day, the UV Index begins its ascent at 07:00 with a moderate reading of 3, but by 10:00, it peaks at an impressive 9, signaling that sun protection is crucial. The intensity remains high from 11:00 to 12:00, sustaining another peak of 9 before slowly declining throughout the afternoon. By 14:00, the index drops to 6, transitioning to a gentler level as it moves toward the evening. As the sun sets, the index dwindles to 1 by 17:00 and reaches a comfortable 0 by 19:00. It’s a dynamic day of sun exposure, making the mid-morning to early afternoon the perfect time to stay vigilant about UV protection!

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	3	moderate	30 min
08:00	5	moderate	30 min
09:00	7	high	25 min
10:00	8	very high	15 min
11:00	9	very high	15 min
12:00	9	very high	15 min
13:00	8	very high	15 min
14:00	6	high	25 min
15:00	4	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Yamada

As the seasons change, so does the UV Index, which indicates the strength of ultraviolet radiation. January starts with a low UV Index of 2, increasing gradually to a moderate 4 in February. By March, the Index rises to 6 (high), and April and May see very high levels, peaking at 9 in May. The summer months of June and August experience extreme UV levels of 11, while July remains very high at 10. As summer fades into fall, September experiences a decline to 9, followed by October’s high level of 6. The year closes with November and December at moderate levels of 4 and 3, respectively. Visitors and residents alike should take precaution during the high-risk months of April through August, where burn times are significantly reduced. To protect your skin, it’s advisable to wear sunscreen, seek shade, and wear protective clothing, especially during peak UV hours.

Monthly Maximum UV Index for Yamada, Japan

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

The table above highlights how UV exposure in Yamada 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.

Yamada'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
Yamada	2	4	6	8	9	11	10	11	9	6	4	3
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