UV Index in Tsu, Japan

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in Tsu, Japan, where the sun can shine brightly, particularly during the summer months. With peak UV levels regularly reaching an intense 12 around midday, being aware of these readings is essential for sunburn prevention and maintaining long-term skin health. As a city within the Cfa climate zone, Tsu experiences warm, humid summers that elevate UV exposure risks. By staying informed about the UV Index, you can better protect yourself from harmful ultraviolet radiation while enjoying all that this beautiful region has to offer.

Hourly UV Index in Tsu

The UV Index today showcases a dramatic rise in intensity as the sun climbs higher, peaking at an impressive 12 at 12:00 PM. Early risers will find the morning hours mild, starting with a low 2 at 7:00 AM, gradually increasing to 4 by 8:00 AM. The intensity continues to escalate, reaching 10 by 10:00 AM and maintaining a high of 11 at 11:00 AM. However, as the afternoon progresses, the UV levels begin to dip—falling to 9 at 2:00 PM and tapering off to 3 by 4:00 PM. By evening, the index settles back to a safe 1 at 6:00 PM, finally dropping to 0 as night falls. It's essential to protect your skin during those peak hours when the UV Index reaches its zenith!

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	7	high	25 min
10:00	10	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	0	low	45 min

Monthly UV Index Trends in Tsu

Throughout the year, UV exposure fluctuates significantly, with high-risk months occurring from March to September. The UV Index peaks in July at 12, categorized as extreme, with only 10 minutes until burn time. Both April and May also present critical UV levels of 11. Residents and visitors should exercise caution during these months, wearing protective clothing, using sunscreen of SPF 30 or higher, and seeking shade during peak sunlight hours. In contrast, January, November, and December offer a more moderate UV Index of 4 to 5, with burn times of 30 minutes or more, making sun protection less critical during this period. Continuous awareness of seasonal UV changes is essential for health and safety.

Monthly Maximum UV Index for Tsu, Japan

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

The table above highlights how UV exposure in Tsu 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.

Tsu'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
Tsu	4	6	8	11	11	11	12	11	10	7	5	4
Osaka UVI	4	6	8	11	11	11	12	11	10	7	5	3