UV Index in Takamatsu, Japan

Last updated: July 2, 2025

In Takamatsu, Japan, being aware of the UV Index is crucial for protecting your skin and maintaining overall health. Understanding UV levels helps prevent sunburn, reduces the risk of skin cancer, and fosters a more enjoyable outdoor experience. With a humid subtropical climate (Cfa), Takamatsu faces varying UV exposure risks throughout the day, peaking at a high of 12 around noon. Regularly monitoring the UV Index can help residents and visitors make informed decisions about sun protection, ensuring they enjoy the vibrant outdoor life this beautiful city has to offer while safeguarding their skin.

Hourly UV Index in Takamatsu

As the day unfolds, the UV Index climbs steadily, peaking at a striking 12 around noon, signaling a high risk for skin damage without protection. Early risers at 07:00 encounter a mild 2, but the intensity increases quickly, reaching 9 by 10:00 and a critical 11 by 11:00. From 12:00 to 13:00, the index holds its highest point at 12, making it essential to seek shade or apply sunscreen. After 13:00, the UV levels gradually decrease, dropping back to a manageable 4 by 16:00 and winding down to a safe 1 by 18:00. This hourly data serves as a reminder to take sun safety precautions, especially during peak hours.

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	4	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	4	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 Takamatsu

The UV Index demonstrates significant seasonal variations, highlighting the increasing risk of UV exposure as summer approaches. High-risk months, marked by an extreme category (UV Index 11 and above), include April through August, when the recommended burn time is a mere 10 minutes due to the intense UV radiation. March and September transition into very high levels, requiring caution with 15 minutes of safe exposure. In contrast, winter months like January, February, November, and December feature moderate UV levels (UV Index 4-5), allowing for longer burn times of 30-25 minutes without risk. Visitors and residents are advised to take extra precautions during the high-risk months by wearing sunscreen, protective clothing, and seeking shade to mitigate the dangers of overexposure.

Monthly Maximum UV Index for Takamatsu, Japan

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

The table above highlights how UV exposure in Takamatsu 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.

Takamatsu'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
Takamatsu	4	5	8	11	11	11	12	12	10	7	5	4