UV Index in Shirone, Japan

Last updated: August 1, 2025

In Shirone, Japan, staying informed about the UV Index is crucial for maintaining skin health and preventing sunburn. With a Cfa climate that brings warm summers, residents and visitors alike must understand the varying UV levels throughout the day. High UV readings, peaking between 11 AM and 1 PM, emphasize the need for protective measures to safeguard against potential skin damage. By being aware of the UV Index, you can enjoy outdoor activities while minimizing the risks associated with excessive sun exposure.

Hourly UV Index in Shirone

The UV Index on this sunny day presents a compelling narrative of intensity and caution. Starting the morning gently at 2 by 7:00, the sun gradually escalates its strength, peaking at a robust 11 by 12:00. The midday hours are prime for sun-seekers, but with a UV Index hitting 10 at 11:00, it’s crucial to protect your skin. As the afternoon rolls in, the intensity diminishes, dipping to 5 by 15:00 and falling even lower to 1 by 17:00, making late afternoon and evening more suitable for outdoor activities without as much risk. However, as dusk approaches, the UV Index plunges to 0 by 19:00, marking a safe end to sun exposure. Embrace the sunshine wisely!

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	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	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	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Shirone

Throughout the year, UV exposure varies significantly, peaking during the summer months. The highest risk for sunburn occurs from April to August, with the UV Index reaching extreme levels of 11 in both July and August, where the burn time is as short as 10 minutes. March marks the transition to higher UV levels, classified as high, and offers a burn time of 25 minutes. As spring progresses into summer, the risk escalates, with the very high category dominating from April through September, emphasizing the need for sun protection. Visitors and residents should take precautionary measures during these high-risk months, including wearing sunscreen, protective clothing, and seeking shade, especially during peak hours. As the year winds down, November and December return to a moderate UV Index (3-4), allowing for more time outdoors, but vigilance is still recommended.

Monthly Maximum UV Index for Shirone, Japan

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

The table above highlights how UV exposure in Shirone 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.

Shirone'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
Shirone	3	4	7	9	10	10	11	11	9	6	4	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