UV Index in Itoman, Japan

Last updated: June 2, 2025

In Itoman, Japan, understanding the UV Index is crucial for protecting your skin from harmful ultraviolet rays. With UV levels peaking at 13 during the midday hours, it’s essential for residents and visitors alike to be aware of their sun exposure to prevent sunburn and maintain overall skin health. Itoman's Cfa climate brings warm summers and year-round daylight, which elevates the risk of UV radiation, particularly from 10 AM to 2 PM. By staying informed about the UV Index, you can enjoy the beautiful outdoors while prioritizing your well-being.

Hourly UV Index in Itoman

As the sun rises on this radiant day, the UV Index begins its ascent, starting at a mild 1 at 07:00 and gradually climbing. By 09:00, it reaches 6, indicating it's time to take some precautions. The intensity peaks at 12:00 with a robust 13, making it essential to seek shade and wear protective gear. For the next hour, the UV Index holds steady at its maximum, but begins to dip as the afternoon progresses—dropping to 8 by 15:00 and further down to 1 by 19:00. This fluctuation highlights the importance of sun safety, especially during the midday hours when UV exposure is at its highest.

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	9	very high	15 min
11:00	11	extreme	10 min
12:00	13	extreme	10 min
13:00	13	extreme	10 min
14:00	11	extreme	10 min
15:00	8	very high	15 min
16:00	5	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 Itoman

Throughout the year, the UV Index exhibits significant fluctuations, with the highest levels occurring during the late spring and summer months. From February to September, the index reaches extreme highs, particularly in March to August, where the UV Index consistently sits at 13 with a minimal burn time of 10 minutes. The high-risk months are clearly identified as March through September, when individuals should take extra precautions. In contrast, January and December see lower UV levels, categorized as high with a burn time of 25 minutes, while October and November experience very high levels (UV Index 9) but allow slightly longer exposure (15 minutes). To ensure safety, residents and visitors are strongly advised to wear protective clothing, apply sunscreen frequently, and seek shade during peak sun hours in the high-risk months.

Monthly Maximum UV Index for Itoman, Japan

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

The table above highlights how UV exposure in Itoman 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.

Itoman'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
Itoman	7	9	11	12	13	13	13	13	12	9	9	6