UV Index in Numata, Japan

Last updated: May 3, 2025

In Numata, Japan, being aware of the UV Index is crucial for protecting your skin and overall health. Understanding UV levels is essential not only for preventing painful sunburns but also for reducing the long-term risks of skin damage and ailments. With a Dfb climate, Numata experiences varying UV exposure throughout the day, peaking at a striking index of 11 around midday. This underscores the importance of monitoring UV levels, especially during those hours, to safeguard your skin and enjoy the beautiful, sunny days that Numata has to offer.

Hourly UV Index in Numata

As the sun rises, the UV Index begins its ascent, starting at a modest 2 at 7:00 AM. By 8:00 AM, it surges to 5, signaling the onset of midday sun exposure. The intensity peaks at 11 from 11:00 AM to 12:00 PM, making these hours crucial for sun protection. As the afternoon progresses, the index gradually declines, dipping to 9 at 1:00 PM, and then further to 7 by 2:00 PM. By late afternoon, at 5:00 PM, the UV Index drops to 5, and eventually settles at a low of 1 by 6:00 PM. Finally, as the sun sets, the UV Index returns to 0 by 7:00 PM. It's clear that during the peak hours of 11 AM to 12 PM, protective measures are highly recommended for safety under the sun.

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	5	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	9	very high	15 min
14:00	7	high	25 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 Numata

Throughout the year, UV radiation levels fluctuate significantly, impacting exposure risks for visitors and residents. The high-risk months for UV exposure are March through August, where the UV Index reaches very high to extreme levels, particularly peaking at an Index of 11 during May to August, allowing for a burn time of just 10 minutes. In contrast, the moderate UV conditions in January, November, and December allow for longer burn times of 30 minutes but still require caution. Visitors and residents should take appropriate precautions, such as wearing sunscreen, protective clothing, and sunglasses, especially during high UV months, to minimize the risk of skin damage.

Monthly Maximum UV Index for Numata, Japan

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

The table above highlights how UV exposure in Numata 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.

Numata'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
Numata	4	6	9	9	11	11	11	11	10	7	5	3
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