UV Index in Uwajima, Japan

Last updated: August 1, 2025

Understanding the UV Index in Uwajima, Japan is crucial for protecting your skin from harmful ultraviolet radiation. With the potential for high UV levels, particularly during midday hours, awareness can help prevent sunburn and long-term skin health issues. Uwajima's climate, classified as Cfa, features warm summers that can elevate UV exposure risks, especially when the UV Index peaks at an impressive 12 around noon. Staying informed about daily UV levels empowers residents and visitors alike to enjoy the sun safely while safeguarding their health.

Hourly UV Index in Uwajima

As the sun rises, the UV Index begins its ascent, starting at a low 2 at 7:00 AM. By 9:00 AM, it ramps up to a moderate 6, signaling that sun protection is becoming essential. The peak of the day arrives at 12:00 PM when the index skyrockets to a striking 12, suggesting that precautions against UV exposure are crucial. The intensity then gradually decreases, tapering off to 10 by 2:00 PM and falling further to a mild 4 by 4:00 PM. As evening approaches, the UV Index drops to 1 by 6:00 PM, indicating a safer time to enjoy the outdoors without the same level of concern. Keep this UV journey in mind for a safe and sun-smart day!

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	1	low	45 min
08:00	3	moderate	30 min
09:00	6	high	25 min
10:00	8	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	7	high	25 min
16:00	4	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 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