UV Index in Ogawa, Japan

Last updated: May 3, 2025

Understanding the UV Index in Ogawa, Japan is crucial for maintaining skin health and preventing sunburn. With its Cfa climate, Ogawa experiences periods of high UV exposure, particularly during the peak hours from 10 AM to 1 PM, where the index can soar to 11, indicating a very high risk of harm from unprotected sun exposure. Being aware of these UV levels can help residents and visitors take necessary precautions, such as wearing sunscreen and protective clothing, ensuring enjoyable outdoor activities without the risk of damaging effects from the sun. Stay informed and protect your skin from the powerful rays of Ogawa's sun!

Hourly UV Index in Ogawa

The UV Index throughout the day shows a stark rise as the sun climbs higher in the sky. Starting at a modest 2 at 07:00, it quickly escalates, hitting 5 by 08:00. The peak occurs between 11:00 and 12:00, reaching a significant 11, indicating a high risk for damage from unprotected sun exposure. As the afternoon progresses, the index gradually decreases, dropping to 9 at 13:00 and further to 7 by 14:00. By late afternoon, the UV levels decline sharply, returning to 5 at 15:00, followed by a mere 2 at 16:00. As the sun sets, the UV Index falls to 1 at both 17:00 and 18:00, and finally reaches 0 by 19:00, signaling a safe end to sun exposure for the day. Be cautious during the midday hours when the sun's rays are strongest!

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	5	moderate	30 min
09:00	7	high	25 min
10:00	9	very high	15 min
11:00	11	extreme	10 min
12:00	11	extreme	10 min
13:00	9	very high	15 min
14:00	7	high	25 min
15:00	5	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Ogawa

Throughout the year, UV exposure varies significantly, necessitating careful planning for both visitors and residents. The high-risk months for UV radiation are from March to August, with the UV Index peaking at an extreme level of 11 during May, June, July, and August, where the recommended burn time is just 10 minutes. In contrast, January, November, and December present a moderate UV Index of 3 to 5, allowing for longer exposure times of 30 minutes. To ensure safety, it is crucial to wear sunscreen, protective clothing, and sunglasses during the high-risk months, and to seek shade whenever possible to minimize skin damage from excessive UV radiation.

Monthly Maximum UV Index for Ogawa, Japan

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

The table above highlights how UV exposure in Ogawa 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.

Ogawa'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
Ogawa	3	5	8	9	11	11	11	11	9	7	5	3
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