UV Index in Goto, Japan

Last updated: May 3, 2025

In Goto, Japan, staying informed about the UV Index is crucial for safeguarding your skin health and preventing sunburns. Understanding UV levels allows residents and visitors alike to take proactive measures against harmful rays, especially during peak sun hours when the UV Index reaches a maximum of 11 from 12:00 PM to 1:00 PM. With Goto's Cfa climate, which brings warm, humid summers and mild winters, the risk of overexposure increases, making it essential to plan outdoor activities wisely. Embrace the sun safely by staying UV-aware—your skin will thank you!

Hourly UV Index in Goto

At sunrise, the UV Index starts gently at 1 at 07:00, making it a safe time for morning activities. However, as the sun climbs higher, the intensity surges, reaching 3 by 08:00 and escalating to a peak of 11 between 12:00 and 13:00. This is the crucial window when protection from the sun is essential, as exposure can lead to skin damage. As afternoon progresses, the index gradually declines, settling back to 9 by 14:00. By the time evening approaches, the UV Index dips to 2 at 17:00 and returns to a minimal 1 by 18:00, signaling a return to safer levels. Whether you’re planning outdoor fun or just soaking up the sun, be mindful of these fluctuations for optimal UV safety!

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	1	low	45 min
08:00	3	moderate	30 min
09:00	5	moderate	30 min
10:00	8	very high	15 min
11:00	10	very high	15 min
12:00	11	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 Goto

Throughout the year, UV intensity experiences notable fluctuations, with the most high-risk months typically occurring from March to August. During this peak season, UV Index values reach very high to extreme levels, particularly in May and July where the index hits 12 and the recommended burn time decreases to just 10 minutes. Residents and visitors are strongly advised to take precautionary measures by wearing sunscreen, protective clothing, and sunglasses, especially during these months when the risk of skin damage is significantly heightened. As the year progresses towards fall and winter, UV exposure diminishes, decreasing to a moderate level in January and December, allowing for more leisurely outdoor activities with less concern for UV-related risks.

Monthly Maximum UV Index for Goto, Japan

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

The table above highlights how UV exposure in Goto 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.

Goto'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
Goto	4	6	8	10	11	11	12	12	10	8	6	4