UV Index in Iheya, Japan

Last updated: May 3, 2025

In Iheya, Japan, being aware of the UV Index is crucial for safeguarding your skin and preventing sunburn. Understanding UV levels helps residents and visitors make informed choices about outdoor activities, especially during the peak hours when exposure risk is highest. With a Cfa climate, Iheya experiences significant sunlight, particularly between 10 AM and 2 PM, when the UV Index can soar to levels of 11 to 13, indicating a very high risk of harm from unprotected solar exposure. Protecting your skin starts with awareness, so stay informed and enjoy the beautiful sunshine safely!

Hourly UV Index in Iheya

The UV Index for the day exhibits a striking daytime peak, rising steadily from a gentle 1 at 07:00 to an intense 13 by 12:00. As the sun reaches its zenith, the 11:00 and 12:00 hours warn of heightened exposure, with the index hitting its maximum at 13:00 before beginning its gradual decline. By 15:00, it slips to 7, reminding us that even in the afternoon, protection is vital. As the day winds down, the UV levels fall back to a safe 1 by 18:00, ensuring a return to safer conditions for evening activities. Stay vigilant and protect your skin during those midday 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	1	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	13	extreme	10 min
13:00	12	extreme	10 min
14:00	10	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 Iheya

As the seasons change, so do UV levels, with significant peaks occurring in the spring and summer months. High-risk months for UV exposure are from March to September, when the index reaches extreme levels of 11 to 13, resulting in a quick burn time of just 10 minutes. February also poses a risk with a very high index of 8. In contrast, the UV Index drops in the fall and winter, reaching a high of 7 in January and decreasing to 6 by December. To protect yourself during the high-risk months, it is crucial to wear sunscreen, protective clothing, and seek shade during peak hours. Residents and visitors alike should remain vigilant about UV exposure, especially in the summer, to minimize the risk of skin damage.

Monthly Maximum UV Index for Iheya, Japan

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

The table above highlights how UV exposure in Iheya 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.

Iheya'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
Iheya	7	8	11	12	13	13	13	13	12	9	8	6