UV Index in Izena, Japan

Last updated: July 2, 2025

Understanding the UV Index is crucial for the residents and visitors of Izena, Japan, as it plays a key role in promoting sun safety and skin health. The varying UV levels throughout the day highlight the importance of being aware of potential risks such as sunburn and long-term skin damage. With Izena's humid subtropical climate (Cfa), the sun can pose serious exposure risks, particularly in the peak hours when the UV Index soars to levels of 11 and 13. Stay informed and protect your skin by checking the UV Index regularly!

Hourly UV Index in Izena

As the sun rises, the UV Index begins its ascent, starting at a moderate 1 at 07:00. By 08:00, it climbs to a 3, but the real intensity emerges by 10:00, peaking at an impressive 11, indicating a high risk of harm from unprotected sun exposure. The intensity remains fierce, soaring to a maximum of 13 at 12:00 and 13:00, before gradually receding. As afternoon fades into evening, the UV Index drops to 8 at 15:00, and then quickly descends to 1 by 18:00. This daily pattern serves as a reminder to stay protected during the peak hours to enjoy the sun safely!

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	5	moderate	30 min
10:00	9	very high	15 min
11:00	11	extreme	10 min
12:00	13	extreme	10 min
13:00	13	extreme	10 min
14:00	11	extreme	10 min
15:00	8	very high	15 min
16:00	5	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 Izena

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 Izena, Japan

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

The table above highlights how UV exposure in Izena 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.

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