UV Index in Miyake, Japan

Last updated: June 2, 2025

In Miyake, Japan, awareness of the UV Index is crucial for protecting your skin and overall health. Understanding the daily UV levels helps residents and visitors alike to effectively prevent sunburn and minimize the risk of long-term skin damage. With a Cfa climate, characterized by warm summers and high humidity, Miyake experiences varying UV exposure throughout the day, peaking at a notable 11 between 11:00 AM and 12:00 PM. By staying informed about UV levels, you can enjoy the beautiful outdoors while safeguarding your skin from harmful rays.

Hourly UV Index in Miyake

The UV Index experiences a dramatic rise as the day unfolds, peaking in the late morning to early afternoon. Starting at a low 2 by 7:00 AM, it escalates to a moderate 5 by 8:00 AM, before soaring to a striking 10 at 10:00 AM. By 11:00 AM and 12:00 PM, the UV Index reaches its zenith at 11, indicating a very high level of UV radiation that calls for protective measures. As the afternoon progresses, the index begins to decline, falling to 8 by 2:00 PM and gradually dropping to 5 at 3:00 PM. By 4:00 PM, it slips further to 3 and dwindles to 1 by 5:00 PM, finally settling at 0 after 6:00 PM. This pattern highlights the crucial hours for sun safety, especially between 11:00 AM and 12:00 PM, when UV exposure is at its highest.

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	5	moderate	30 min
09:00	8	very high	15 min
10:00	10	very high	15 min
11:00	11	extreme	10 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	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Miyake

Throughout the year, UV exposure varies significantly, highlighting the need for awareness among visitors and residents. High-risk months for UV exposure fall between March and August, where the UV Index reaches very high to extreme levels, particularly in May and July when it peaks at 12. The burn time during these months can be as little as 10 minutes, stressing the importance of protective measures like sunscreen and clothing. In contrast, January and December present a relatively lower risk, with a moderate UV Index of 4 and a burn time of 30 minutes. Therefore, as summer approaches, it is essential to remain vigilant against UV exposure and take necessary precautions, while also being aware of the seasonal decrease in UV risk during the winter months.

Monthly Maximum UV Index for Miyake, Japan

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

The table above highlights how UV exposure in Miyake 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.

Miyake'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
Miyake	4	6	8	10	11	11	12	11	10	7	6	4