UV Index in Himimachi, Japan

Last updated: July 2, 2025

In Himimachi, Japan, being aware of the UV Index is crucial for protecting your skin from harmful sun exposure. Understanding UV levels helps you take necessary precautions to prevent sunburn and maintain long-term skin health. With a Cfa climate that often brings sunny and warm days, the UV Index can spike, peaking at a notable 11 during midday hours. This emphasizes the importance of staying informed about UV risks, especially when planning outdoor activities. By monitoring the UV Index in Himimachi, you can enjoy the sunshine safely and effectively!

Hourly UV Index in Himimachi

As the sun rises, the UV Index begins its ascent, starting at a gentle 2 at 07:00. By 08:00, it climbs to 4, indicating that protective measures are beginning to be advisable. The intensity peaks at 11 during the 11:00 and 12:00 hours, marking the time when sunlight is most potent. As the afternoon progresses, the index starts to decline; by 14:00, it drops to 8, and further diminishes to 6 by 15:00. As evening approaches, the UV Index wanes significantly, reducing to 3 at 16:00 and sinking to a mild 1 by 18:00, indicating a much lower risk. Overall, it’s a sun-soaked day, urging outdoor enthusiasts to be mindful of sun exposure, especially during those peak 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	11	extreme	10 min
13:00	10	very high	15 min
14:00	8	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 Himimachi

As the seasons change, so do UV levels, with significant increases during the warmer months. From March to August, the UV Index rises dramatically, peaking at 11 (extreme) in June, July, and August, where burn times are as short as 10 minutes. April and May also present high risk, with a UV Index of 10 (very high) and burn times of 15 minutes. Conversely, the risk decreases significantly in the cooler months, with a moderate exposure category during January, February, November, and December, allowing for 30 minutes of safe sun exposure. Visitors and residents should take extra precautions from March to September, using sunscreen, wearing protective clothing, and seeking shade, especially during peak hours, to minimize sun damage.

Monthly Maximum UV Index for Himimachi, Japan

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

The table above highlights how UV exposure in Himimachi 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.

Himimachi'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
Himimachi	3	5	7	10	10	11	11	11	9	6	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