UV Index in Kakogawa, Japan

Last updated: July 2, 2025

In Kakogawa, Japan, staying aware of the UV Index is essential for safeguarding your skin and overall health. Understanding UV levels is crucial to prevent sunburn and reduce the risk of long-term skin damage, especially in a region with a humid subtropical climate like Kakogawa, where UV exposure can be intense during peak hours. With UV Index readings peaking at a significant 12 around noon, it's vital for residents and visitors to take necessary precautions against harmful rays, ensuring a healthy and enjoyable experience under the sun.

Hourly UV Index in Kakogawa

The day's UV Index starts off mild, peaking at 2 by 7 AM, ideal for early morning strolls. As the sun rises, the index steadily climbs, hitting 4 by 8 AM and reaching 6 at 9 AM. By 10 AM, the intensity skyrockets to 9, and then the sun shines its brightest from 11 AM to 12 PM, where it peaks at an intense 12. The afternoon remains intense but slightly less so, with values of 11 at 1 PM and 9 at 2 PM, before tapering off to 6 at 3 PM. A gentle decline continues into the evening, bringing the index down to 3 by 4 PM, and finally settling at 1 by 6 PM, making the evening safe for outdoor activities. It's crucial to protect your skin during the peak UV 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	3	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 Kakogawa

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 Kakogawa, Japan

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

The table above highlights how UV exposure in Kakogawa 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.

Kakogawa'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
Kakogawa	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