UV Index in Kochi, Japan

Last updated: May 3, 2025

In Kochi, Japan, awareness of the UV Index is crucial for protecting your skin from harmful rays. Knowing the UV levels can help you prevent sunburns and promote overall skin health, especially during peak exposure times. With a humid subtropical climate that brings long, sunny days, Kochi residents and visitors face significant UV exposure risks, particularly from mid-morning to early afternoon when the index soars to a staggering 11. Stay informed and take proactive measures to enjoy the sun safely!

Hourly UV Index in Kochi

The UV Index begins its climb at 7:00 AM with a low level of 2, signaling a gentle start to the day. By 9:00 AM, it surges to 6, as the sun strengthens. The peak occurs around 11:00 AM to 1:00 PM, where it reaches a high of 11, indicating a need for sun protection. After this peak, the UV levels gradually decline, dipping to 9 by 2:00 PM and further to 3 by 4:00 PM. As the sun sets, the intensity decreases quickly, reaching 1 at 6:00 PM and finally dropping to 0 by 7:00 PM. This data highlights the midday hours as the most critical time for sun safety.

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	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	11	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 Kochi

Throughout the year, the UV Index experiences significant fluctuations, with the highest risk months occurring from March to August, where it often reaches extreme levels. Notably, April, May, June, July, and August all register a UV Index of 12, indicating critical exposure levels with a burn time of only 10 minutes. Visitors and residents should take precautions during these months, such as wearing sunscreen, protective clothing, and seeking shade during peak sun hours. Conversely, from January to February and October to November, the UV levels are lower, categorized as moderate to high, allowing for a more comfortable outdoor experience, although caution is still advised. In December, the UV Index drops back to 4, reverting to a moderate category where burn time extends to 30 minutes, making it the safest month for outdoor activities. Overall, awareness of the UV Index can help individuals protect themselves from harmful sun exposure year-round.

Monthly Maximum UV Index for Kochi, Japan

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

The table above highlights how UV exposure in Kochi 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.

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