UV Index in Komagane, Japan

Last updated: July 2, 2025

Understanding the UV Index in Komagane, Japan is essential for safeguarding your skin against the potentially harmful effects of sun exposure. With UV levels peaking between 10 AM and 1 PM when the index soars to 12, residents and visitors alike must be vigilant to prevent sunburn and maintain skin health. Komagane's Dfb climate brings a unique combination of seasonal variation and varying UV exposure risks, making it crucial to stay informed about daily UV fluctuations. By becoming aware of the UV Index, you can enjoy the outdoors safely while minimizing the risk of long-term skin damage.

Hourly UV Index in Komagane

The UV Index paints a vivid picture of the sun's intensity throughout the day. Early risers will find a gentle start at 7:00 AM with a mild UVI of 2, but as the sun climbs higher, the intensity sharply rises to 8 by 9:00 AM and peaks at a striking 12 between 11:00 AM and 12:00 PM. This aggressive UV exposure begins to taper off in the afternoon, dropping to 6 by 3:00 PM and continuing to diminish as the sun sets, with a final UVI of 0 by 7:00 PM. To stay protected during the peak hours, enjoying the outdoors between 10:00 AM and 2:00 PM requires caution—it's the sun’s strongest embrace!

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	12	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	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 Komagane

As the seasons change, so do the UV Index levels, significantly influencing sun exposure risk throughout the year. High-risk months are from March to August, when the UV Index peaks at 11 to 12, indicating extreme exposure with a burn time as short as 10 minutes. Particularly critical are May and July, when the UV Index consistently reaches its maximum. Conversely, the winter months of January and December present a moderate risk with an Index of 4, allowing for a safer exposure time of 30 minutes. To ensure safety, visitors and residents are advised to take precautions during high UV Index months by wearing sunscreen, protective clothing, and seeking shade, especially during midday hours when UV exposure is greatest.

Monthly Maximum UV Index for Komagane, Japan

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

The table above highlights how UV exposure in Komagane 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.

Komagane'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
Komagane	4	6	9	10	11	11	12	12	10	7	6	4