UV Index in Yonago, Japan

Last updated: June 2, 2025

Understanding the UV Index is crucial for the residents of Yonago, Japan, particularly as outdoor activities abound in this vibrant city. Awareness of UV levels can significantly aid in sunburn prevention and promote better skin health, helping you enjoy the sunshine safely. With a Cfa climate that features warm, humid summers, Yonago experiences notable UV exposure risks, especially during midday when levels can reach a peak of 11. Staying informed about these fluctuations ensures you can protect yourself and your loved ones while enjoying the beautiful outdoors.

Hourly UV Index in Yonago

The UV Index paints a vivid picture of the sun’s strength throughout the day. Starting at a modest 2 at 07:00, the index gradually climbs as the sun ascends, reaching 4 by 08:00. By 09:00, it spikes to 6, and before long, it peaks at an impressive 11 at 12:00, marking the most intense exposure. The afternoon starts to cool slightly, with the index dropping to 10 by 13:00 and then tapering off through 8 at 14:00, 6 at 15:00, and back to 4 at 16:00. As the sun begins its descent, the UV Index falls to 2 by 17:00, lingering at 1 through the evening hours, creating a gentle reminder to enjoy the sun but also to stay mindful of its intensity 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	8	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	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 Yonago

Throughout the year, UV exposure significantly varies, peaking during the summer months of June through August, when the UV Index reaches extreme levels between 11 and 12 and the burn time drops to just 10 minutes. The high-risk months are particularly from April to September, where UV levels rise to very high to extreme values, requiring heightened awareness for sun protection. Visitors and residents should adopt protective measures, such as wearing sunscreen, hats, and sunglasses, especially during the peak UV hours from 10 a.m. to 4 p.m. Conversely, the winter months from December to February present a lower risk with a UV Index between 3 and 5. Although the risk decreases, it's still important to remain cautious, as UV radiation can still cause skin damage even on cloudy days.

Monthly Maximum UV Index for Yonago, Japan

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

The table above highlights how UV exposure in Yonago 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.

Yonago'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
Yonago	4	5	7	10	10	11	12	11	10	7	5	3
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