UV Index in Nagawa, Japan

Last updated: June 2, 2025

Understanding the UV Index in Nagawa, Japan, is crucial for ensuring optimal skin health and preventing sunburn, particularly during the sunny summer months characteristic of this Dfb climate zone. As daily UV levels fluctuate, vigilance becomes essential; the index can reach a high of 11 between 11 AM and 1 PM, indicating extreme sun exposure risks. By being aware of these UV levels, residents and visitors can take proactive measures to protect their skin, ensuring enjoyable outdoor activities without the harmful effects of overexposure to UV radiation. Stay informed to safeguard your health and make the most of Nagawa's beautiful, sunny days!

Hourly UV Index in Nagawa

As the sun rises, the UV Index steadily climbs, reaching its peak between 11:00 and 12:00 with a striking 11, indicating intense solar radiation that calls for sunscreen and protection. The morning starts at a manageable 3 at 07:00, escalating to 8 by 14:00 before beginning its descent. After midday, the UV intensity drops significantly, plummeting to 2 by 17:00 and fading to a gentle 0 by 19:00. This hourly fluctuation emphasizes the importance of timing exposure to the sun, ensuring safety during the most potent hours. Remember, during those peak times, it's wise to seek shade and shield your skin!

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	3	moderate	30 min
08:00	5	moderate	30 min
09:00	7	high	25 min
10:00	10	very high	15 min
11:00	11	extreme	10 min
12:00	11	extreme	10 min
13:00	10	very high	15 min
14:00	8	very high	15 min
15:00	5	moderate	30 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 Nagawa

Throughout the year, UV exposure varies significantly, with the highest risk months being May through August when the UV Index reaches an extreme level of 11. During these months, the recommended burn time is reduced to just 10 minutes, necessitating vigilant sun protection practices. Notably, March and April also present high risk, characterized by very high UV indices of 8 and 9, respectively, with burn times of just 15 minutes. As UV levels taper off from September to December, residents and visitors should remain cautious, especially in the early months of spring. It’s vital for everyone to stay informed about UV levels and take appropriate protective measures, such as applying sunscreen, wearing protective clothing, and seeking shade, particularly during peak hours.

Monthly Maximum UV Index for Nagawa, Japan

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

The table above highlights how UV exposure in Nagawa 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.

Nagawa'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
Nagawa	4	6	8	9	11	11	11	11	10	7	5	3
Osaka UVI	4	6	8	11	11	11	12	11	10	7	5	3