UV Index in Biei, Japan

Last updated: May 3, 2025

Understanding the UV Index is essential for residents and visitors of Biei, Japan, where stunning landscapes can sometimes lead to unexpected sun exposure. Being aware of UV levels helps in effectively preventing sunburn and protecting skin health, particularly during peak hours when exposure is at its highest. Nestled in a Dfb climate zone, Biei experiences varying UV exposure throughout the day, with indices peaking at a significant 9 around 11:00 AM. As you enjoy the breathtaking scenery, make sure to stay informed about the UV Index to safeguard your skin from potential harm!

Hourly UV Index in Biei

At dawn, the UV Index begins at a mild 3 by 07:00, gradually climbing as the sun rises. By 08:00, it reaches 5, hinting at returning outdoor activities. The intensity peaks at 11:00 with a robust 9, signaling the need for sun protection. From there, it gently declines, recording 8 at 12:00 and 7 at 13:00, before tapering off further to 6 by 14:00. As afternoon gives way to evening, the index drops to 4 at 15:00 and continues its descent to a low of 1 by 17:00 and 18:00. Finally, the UV reaches 0 as the sun sets at 19:00, marking a day that started softly but peaked in intensity.

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	6	high	25 min
10:00	8	very high	15 min
11:00	9	very high	15 min
12:00	8	very high	15 min
13:00	7	high	25 min
14:00	6	high	25 min
15:00	4	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 Biei

Throughout the year, the UV Index experiences significant seasonal changes, impacting the risk of sunburn and the need for protective measures. The highest risk months are from May to September, characterized by very high UV Index levels of 9 to 10 and a burn time of just 15 minutes. In contrast, January and December present a much lower risk with a UV Index of 2, allowing for longer exposure times of 45 minutes. Residents and visitors are advised to take special care during peak months by wearing protective clothing, using sunscreen, and seeking shade to minimize UV exposure. As conditions fluctuate, it's essential to stay informed and adjust sun protection strategies accordingly.

Monthly Maximum UV Index for Biei, Japan

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

The table above highlights how UV exposure in Biei 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.

Biei'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
Biei	2	3	6	7	9	9	10	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