UV Index in Tateyama, Japan

Last updated: July 2, 2025

Being aware of the UV Index is crucial for residents and visitors in Tateyama, Japan, where the sun's rays can be particularly intense, especially during the summer months in this Cfa climate zone. Understanding UV levels is essential for effective sunburn prevention and maintaining long-term skin health. With UV Index readings reaching a peak of 11 around noon, it's imperative to take precautions when spending time outdoors. High levels of ultraviolet radiation can lead to serious skin damage, highlighting the importance of vigilance against potential risks throughout the day. Stay informed and protect yourself from the sun’s harmful effects while enjoying the beautiful surroundings of Tateyama!

Hourly UV Index in Tateyama

As the sun rises, the UV Index begins its climb, starting at a modest 2 at 7:00 AM. By 8:00 AM, it gains momentum, reaching 4, but the real peak arrives between 10:00 AM and 12:00 PM, where it soars to a striking 11. This is the time to seek shade or wear protective gear, as the sun's rays are at their harshest. After noon, the intensity wanes slightly with readings of 10 at 1:00 PM and gently dropping to 8 by 2:00 PM. As the afternoon turns to evening, the index cools down to 5 at 3:00 PM, before dipping to 3 by 4:00 PM, and ultimately settling at 1 by 6:00 PM. By sunset, the danger fades, leaving a 0 UV reading at 7:00 PM. Keep an eye on the UV Index to enjoy the sun safely!

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.
TimeUVICategoryTime to Burn
07:002low45 min
08:004moderate30 min
09:007high25 min
10:0010very high15 min
11:0011extreme10 min
12:0011extreme10 min
13:0010very high15 min
14:008very high15 min
15:005moderate30 min
16:003moderate30 min
17:001low45 min
18:001low45 min
19:000low45 min

Monthly UV Index Trends in Tateyama

As the UV Index fluctuates throughout the year, residents and visitors should be particularly cautious during the high-risk months of March through August, when the UV Index reaches very high to extreme levels. In these months, the burn time decreases significantly to just 10-15 minutes. Specifically, May through August shows a consistent UV Index of 11, indicating extreme risk. Conversely, from January to February and in November to December, the UV Index is at a more moderate level (4-5), allowing for longer exposure times of 30 minutes. It is advisable to take protective measures such as wearing sunscreen, hats, and sunglasses, especially during midday hours when UV radiation is strongest. By staying informed and prepared, individuals can enjoy their time outdoors while minimizing the risk of UV-related health issues.

Monthly Maximum UV Index for Tateyama, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Tateyama. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec458101111111110753
Data source: Statistical UV Index data for Tateyama, 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 Tateyama UV Index with Other Japan Cities

The table above highlights how UV exposure in Tateyama 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.
Tateyama's solar exposure compared to other cities in Japan. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Sapporo UVI2367999108532
Yokohama UVI35891111111110754
Tokyo UVI35891111111110754
Tateyama458101111111110754
Nagoya UVI468101111111110753
Osaka UVI468111111121110753