UV Index in Wakkanai, Japan

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors in Wakkanai, Japan, especially given its Dfb climate, which presents unique exposure risks. As the sun's rays intensify throughout the day, with UV levels peaking at a maximum of 8 around noon, awareness of these fluctuations can play a vital role in sunburn prevention and maintaining overall skin health. By monitoring the UV Index, you can take proactive measures to protect yourself from harmful UV radiation, allowing you to enjoy the beautiful, albeit at times intense, sunlight that Wakkanai offers.

Hourly UV Index in Wakkanai

The UV Index analysis reveals a striking pattern throughout the day. Starting at 07:00 with a manageable level of 3, the intensity of ultraviolet radiation escalates, peaking at 11:00 and 12:00, where it reaches a high of 8. After this midday zenith, the UV Index begins to decline, dropping to 7 by 13:00 and gradually tapering off to 4 at both 14:00 and 15:00. By the late afternoon, it dwindles further to 2 at 16:00, before settling to a safe 1 by 17:00 and 18:00, ultimately reaching 0 by 19:00. This data underscores the importance of sun protection during the peak hours, especially between 10:00 and 14:00, when UV exposure can be most harmful.

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	3	moderate	30 min
08:00	4	moderate	30 min
09:00	6	high	25 min
10:00	7	high	25 min
11:00	8	very high	15 min
12:00	8	very high	15 min
13:00	7	high	25 min
14:00	5	moderate	30 min
15:00	4	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Wakkanai

Throughout the year, UV exposure varies significantly, with the high-risk months for UV radiation occurring from April to August. During this period, the UV Index peaks at 9, indicating a very high risk of harm from unprotected sun exposure, with a burn time as short as 15 minutes. In contrast, January and December see the lowest UV Index values (2 and 1, respectively), classified as low exposure, allowing for longer burn times of 45 minutes. Visitors and residents should be particularly vigilant during the high-risk months: wearing sun protection, seeking shade, and limiting outdoor activities during peak hours to mitigate the risks associated with UV exposure.

Monthly Maximum UV Index for Wakkanai, Japan

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

The table above highlights how UV exposure in Wakkanai 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.

Wakkanai'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
Wakkanai	2	3	5	6	8	9	9	8	7	4	3	1
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