UV Index in Yasuda, Japan

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors in Yasuda, Japan, where the climate tends to be humid and warm, offering ample sunshine throughout the year. By staying informed about UV levels, individuals can take necessary precautions against sunburn and long-term skin damage. Yasuda's typical Cfa climate brings significant UV exposure, particularly during the midday hours when the index can reach a maximum of 12. Awareness and protection are key to enjoying the outdoors safely and maintaining skin health in this vibrant region.

Hourly UV Index in Yasuda

As the day unfolds, the UV Index climbs steadily, peaking at a striking 12 around noon, signaling a high risk for skin damage without protection. Early risers at 07:00 encounter a mild 2, but the intensity increases quickly, reaching 9 by 10:00 and a critical 11 by 11:00. From 12:00 to 13:00, the index holds its highest point at 12, making it essential to seek shade or apply sunscreen. After 13:00, the UV levels gradually decrease, dropping back to a manageable 4 by 16:00 and winding down to a safe 1 by 18:00. This hourly data serves as a reminder to take sun safety precautions, especially 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	9	very high	15 min
11:00	11	extreme	10 min
12:00	12	extreme	10 min
13:00	11	extreme	10 min
14:00	9	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 Yasuda

Throughout the year, seasonal UV Index changes highlight significant variations in sun exposure risks. The high-risk months are from March to August, where the UV Index reaches its peak at 12, indicating an extreme exposure category. During these months, the burn time is notably short—only 10 minutes, underscoring the need for heightened sun protection. In contrast, January and December present a moderate risk with UV Index values of 4, allowing for safer exposure of up to 30 minutes. As such, residents and visitors should specifically take precautions between March and August, including wearing sunscreen, protective clothing, and staying in shaded areas during peak sun hours to minimize harmful UV effects.

Monthly Maximum UV Index for Yasuda, Japan

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

The table above highlights how UV exposure in Yasuda 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.

Yasuda'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
Yasuda	4	6	9	11	12	12	12	12	10	8	6	4