UV Index in Youkaichi, Japan

Last updated: June 2, 2025

In Youkaichi, Japan, staying informed about the UV Index is crucial for safeguarding your skin health. Understanding UV levels not only helps prevent painful sunburns but also protects against long-term skin damage. With a humid subtropical climate (Cfa) that often sees intense sunlight, particularly between 10 AM and 1 PM when UV levels peak at an alarming 11, awareness of UV exposure risks is vital. Equip yourself with knowledge to enjoy the outdoors safely—your skin will thank you!

Hourly UV Index in Youkaichi

The UV Index throughout the day paints a vivid picture of sun intensity. Starting at a gentle 2 at 7:00 AM, it ramps up to a mild 4 by 8:00 AM. The heat intensifies, peaking at an impressive 11 around 12:00 PM, signaling the strongest exposure of the day. As the afternoon progresses, between 1:00 PM and 2:00 PM, it remains high at 10 and 8 respectively, before gradually tapering off. By 5:00 PM, the index drops back to a comfortable 2 and continues to decrease, reaching a minimal 0 by 7:00 PM. Remember to protect your skin especially during those peak hours for a safe and enjoyable day outdoors!

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	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	5	moderate	30 min
16:00	3	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Youkaichi

Throughout the year, UV exposure varies significantly, peaking during the summer months. High-risk months for UV exposure are from March to August, when the UV Index reaches its maximum levels of 10 to 11 and the burn time is as brief as 10 minutes. Notably, May through August features extreme exposure, requiring diligent sun protection practices. As the year transitions into fall, September to November sees a decrease in UV levels, with October still posing a moderate risk. To ensure safety, visitors and residents are advised to wear protective clothing, use sunscreen, and seek shade during the peak sun hours, especially from late spring through summer when the threat of sunburn is greatest.

Monthly Maximum UV Index for Youkaichi, Japan

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

The table above highlights how UV exposure in Youkaichi 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.

Youkaichi'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
Youkaichi	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