UV Index in Uwajima, Japan

Last updated: May 3, 2025

In Uwajima, Japan, staying informed about the UV Index is crucial for protecting your skin from harmful ultraviolet rays. Understanding UV levels helps residents and visitors alike prevent sunburn and maintain long-term skin health, especially during the peak afternoon hours when the UV Index can soar to 12. With a humid subtropical climate, Uwajima experiences frequent sunny days, increasing the risk of overexposure. By keeping an eye on the UV Index, you can enjoy the outdoors while minimizing skin damage and promoting overall wellness.

Hourly UV Index in Uwajima

As the sun rises, the UV Index steadily climbs, peaking at 12 around noon, indicating a high risk of harm from unprotected sun exposure. From 07:00 with a low index of 2, it swiftly escalates to 11 by 11:00. The intensity continues with 12 during 12:00, urging everyone to take protective measures. After this zenith, the UV Index begins to decline, falling to 9 at 14:00, and tapering off to a gentle 1 by 18:00, where daylight gives way to twilight. Stay safe and enjoy the sun wisely!

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	3	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	3	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 Uwajima

Throughout the year, the UV Index fluctuates significantly, with the highest risk occurring during the late spring and summer months. March through September marks the peak of UV exposure, particularly from May to August, when the UV Index reaches extremes of 12. During these high-risk months, recommended burn times can be as short as 10 minutes, highlighting the need for increased sun protection measures. Conversely, January, December, and early February see lower UV levels, categorized as moderate and high, allowing for more prolonged exposure, with burn times of 30 minutes in winter. Visitors and residents should remain vigilant during the high UV months by wearing protective clothing, using sunscreen, and seeking shade whenever possible, especially during midday hours when the sun's rays are the strongest.

Monthly Maximum UV Index for Uwajima, Japan

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

The table above highlights how UV exposure in Uwajima 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.

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