UV Index in Masuda, Japan

Last updated: August 1, 2025

Understanding the UV Index in Masuda, Japan is crucial for protecting your skin and overall health. With its Cfa climate, the region experiences significant sunlight throughout the year, making awareness of UV levels essential for preventing sunburn and long-term skin damage. At peak hours, particularly between 10 AM and 2 PM, UV Index values can reach as high as 12, indicating extreme exposure risks. By staying informed about the local UV Index, you can take necessary precautions to enjoy the sun safely while safeguarding your skin health.

Hourly UV Index in Masuda

The UV Index throughout the day showcases a dynamic shift in sun intensity, peaking at 12 around noon. Beginning with a gentle 2 at 7:00 AM, the index steadily increases, hitting 11 by 11:00 AM as the sun climbs higher. By 12:00 PM, the sun reaches its zenith at 12, marking the highest UV exposure, making sun safety a priority. As the afternoon progresses, from 1:00 PM to 3:00 PM, the UV Index gradually decreases to 9 by 2:00 PM and 7 by 3:00 PM. The day winds down with a notable drop in intensity, returning to a mild 1 by 6:00 PM, emphasizing that the safest time to enjoy the sun is before noon or after 4:00 PM.

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 Masuda

As the seasons change, so do UV levels, with notable high-risk months spanning from March to August when the UV Index reaches very high to extreme levels, significantly lowering burn times to just 10-15 minutes. Visitors and residents alike should be particularly vigilant during these months, taking precautions such as wearing sunblock, protective clothing, and seeking shade to minimize skin damage. From September to November, the UV Index decreases, entering the moderate to high exposure categories, where burn times gradually increase to 25-30 minutes. Therefore, while UV exposure is less intense in the colder months, it remains important to stay informed and practice sun safety year-round, especially during the peak summer months.

Monthly Maximum UV Index for Masuda, Japan

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

The table above highlights how UV exposure in Masuda 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.

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