UV Index in Ashoro, Japan

Last updated: July 2, 2025

In Ashoro, Japan, awareness of the UV Index is crucial for safeguarding your skin against harmful ultraviolet radiation. Understanding UV levels is essential not only for preventing painful sunburns but also for promoting long-term skin health. With Ashoro's Dfb climate bringing varied seasonal conditions, residents and visitors alike should be mindful of peak UV exposure—reaching a maximum of 10 around noon. Staying informed on UV Index levels can help you enjoy the outdoors while minimizing the risk of skin damage.

Hourly UV Index in Ashoro

As the sun rises, the UV Index begins its ascent, peaking spectacularly between 11:00 AM and 12:00 PM at a maximal value of 10, signaling a high risk for unprotected skin. Early morning hours, from 7:00 AM to 9:00 AM, see a gentle increase from a mild 3 to a moderate 7. However, by 10:00 AM, the intensity climbs sharply to 9, urging caution for sun exposure. After the midday zenith, the index gradually descends, dropping to 8 at 1:00 PM and continuing to fall until it reaches a minimal 0 by 7:00 PM. This data emphasizes the importance of sun safety, particularly during those peak hours when the sun’s rays are most potent.

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	5	moderate	30 min
09:00	7	high	25 min
10:00	9	very high	15 min
11:00	10	very high	15 min
12:00	10	very high	15 min
13:00	8	very high	15 min
14:00	7	high	25 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 Ashoro

Throughout the year, the UV Index demonstrates significant seasonal variation, with particularly high-risk months occurring from April to September. During this period, the UV Index frequently reaches levels categorized as very high, peaking at 10 in June and July. This translates to a dangerously short burn time of just 15 minutes, emphasizing the importance of sun protection, including sunscreen, hats, and protective clothing. As the year progresses into October and November, the UV Index decreases to more moderate levels, allowing for greater exposure times of 30 minutes without immediate risk of skin damage. Visitors and residents are advised to remain vigilant during peak UV months, seeking shade and reapplying sunscreen as necessary to safeguard their skin health.

Monthly Maximum UV Index for Ashoro, Japan

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

The table above highlights how UV exposure in Ashoro 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.

Ashoro'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
Ashoro	2	3	5	8	8	10	10	9	8	5	3	2
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