UV Index in Iijima, Japan

Last updated: May 3, 2025

In Iijima, Japan, understanding the UV Index is crucial for maintaining skin health and preventing sunburn, especially given the region's Dfb climate with its distinct seasonal variations. With UV levels peaking at 11 during midday, staying informed about these fluctuating levels can help residents and visitors alike protect themselves from the damaging effects of excessive sun exposure. As the sun reaches its peak strength, knowing when to seek shade or apply sunscreen is key to enjoying all that Iijima has to offer while safeguarding your skin.

Hourly UV Index in Iijima

The UV Index throughout the day reveals a dramatic rise in sun intensity, peaking at 11 around 11:00 AM and 12:00 PM. Starting from 07:00 AM with a low of 2, the index escalates rapidly, reaching 10 by 10:00 AM. As the sun climbs higher, it delivers its harshest rays, prompting caution for those outdoors. From 1:00 PM onward, the index gradually declines, hitting 5 at 3:00 PM, and finally tapering off to 0 by 7:00 PM. This profile highlights the importance of sun protection during the midday hours when UV exposure is most intense. Stay safe and protect your skin! 🌞

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	7	high	25 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 Iijima

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 Iijima, Japan

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

The table above highlights how UV exposure in Iijima 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.

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