UV Index in Yakage, Japan

Last updated: July 2, 2025

In Yakage, Japan, awareness of the UV Index is crucial for maintaining skin health and preventing sunburn, particularly during the summer months when UV levels can reach alarming heights. Understanding these levels empowers residents and visitors alike to protect themselves from harmful sun exposure. In this Cfa climate zone, where humid summers can intensify UV radiation, peak indexes soar to a staggering 12 around noon, highlighting the need for vigilant sun protection during outdoor activities. By keeping an eye on the UV Index, you can enjoy the beautiful weather safely while minimizing the risks associated with overexposure to UV rays.

Hourly UV Index in Yakage

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 Yakage

As the year progresses, UV index levels exhibit notable seasonal changes, peaking during the summer months. Specifically, May through August are highlighted as high-risk months, where the UV index reaches extreme levels (11-12), resulting in a quick burn time of just 10 minutes. In contrast, levels decline through late autumn and winter, with January and December showing moderate levels (UV Index 4) and a burn time of 30 minutes. Visitors and residents should be particularly cautious during the spring and summer, seeking shade, wearing protective clothing, and applying high-SPF sunscreen to minimize the risk of skin damage. It's essential to stay informed and take proactive steps to protect against harmful UV exposure during the high-risk months.

Monthly Maximum UV Index for Yakage, Japan

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

The table above highlights how UV exposure in Yakage 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.

Yakage'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
Yakage	4	6	8	10	11	11	12	12	10	7	5	4
Osaka UVI	4	6	8	11	11	11	12	11	10	7	5	3