UV Index in Shimanto, Japan

Last updated: June 2, 2025

Understanding the UV Index in Shimanto, Japan is crucial for safeguarding your skin health and preventing sunburns, especially in a region characterized by its humid subtropical climate. With UV levels soaring as high as 12 during midday, it’s essential to be aware of your exposure to ultraviolet rays. By monitoring the UV Index, you can take proactive steps to protect yourself and loved ones from the damaging effects of the sun, ensuring outdoor activities remain enjoyable and safe. Stay informed—your skin will thank you!

Hourly UV Index in Shimanto

As the day unfolds, the UV Index climbs steadily, peaking at a striking 12 around noon, signaling a high risk for skin damage without protection. Early risers at 07:00 encounter a mild 2, but the intensity increases quickly, reaching 9 by 10:00 and a critical 11 by 11:00. From 12:00 to 13:00, the index holds its highest point at 12, making it essential to seek shade or apply sunscreen. After 13:00, the UV levels gradually decrease, dropping back to a manageable 4 by 16:00 and winding down to a safe 1 by 18:00. This hourly data serves as a reminder to take sun safety precautions, especially during 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	12	extreme	10 min
13:00	11	extreme	10 min
14:00	9	very high	15 min
15:00	6	high	25 min
16:00	4	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 Shimanto

Throughout the year, UV exposure varies significantly, with the highest levels observed from March to September, indicating a seasonal increase in UV radiation. During this period, visitors and residents should be particularly cautious, as the UV Index reaches extreme levels of 12, especially from May to August, with a burn time as brief as 10 minutes. Even in October and November, the UV Index remains elevated, categorized as very high and high, respectively. To ensure safety, it's advisable to wear protective clothing, apply broad-spectrum sunscreen, and seek shade during peak sun hours, particularly in high-risk months from April to September. As the year progresses, individuals can take advantage of the lower UV indices from December to February, when burn times increase to 30 and 25 minutes, making sun safety less critical but still important.

Monthly Maximum UV Index for Shimanto, Japan

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

The table above highlights how UV exposure in Shimanto 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.

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