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UV Index in Date, Japan

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Date, Japan, as it plays a vital role in protecting your skin and overall health. The UV Index indicates the strength of ultraviolet radiation on a given day, helping you gauge the risk of sunburn and long-term skin damage. Given Date's Dfb climate, characterized by moderate summers and cold winters, it is essential to be aware of the UV levels, especially during the peak hours around noon when the index can reach up to 10. This knowledge not only aids in prevention but also encourages healthy outdoor activities without compromising your skin’s safety. Stay informed and protect yourself from harmful UV rays!

Hourly UV Index in Date

As the day unfolds, the UV Index rises dramatically, peaking at 10 by 12:00 PM, indicating a high risk of harm from unprotected sun exposure. From a moderate 4 at 08:00 AM, it steadily climbs, reaching 9 by 11:00 AM, urging early sun seekers to take precautions. After the midday peak, a gradual decline begins, dropping to 7 at 02:00 PM and further to 5 by 03:00 PM. The UV intensity continues to fade throughout the afternoon, settling to a minimal 1 by 05:00 PM, signaling a safer time for outdoor activities. As the day transitions, the sun’s aggressive rays soften, allowing you to enjoy the evening while remaining mindful of skin protection earlier in the day.

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
07:003moderate30 min
08:004moderate30 min
09:006high25 min
10:008very high15 min
11:009very high15 min
12:0010very high15 min
13:009very high15 min
14:007high25 min
15:005moderate30 min
16:003moderate30 min
17:001low45 min
18:001low45 min
19:001low45 min

Monthly UV Index Trends in Date

Throughout the year, the UV Index demonstrates significant seasonal variations that highlight the importance of sun safety. From January to March, the UV levels are generally low to moderate, with burn times ranging from 30 to 45 minutes. However, April marks the start of high-risk months, peaking with May and August, where the UV Index reaches a very high level of 9 and 10, drastically reducing safe sun exposure to just 15 minutes. Following these months, September and October maintain elevated UV levels before returning to more moderate levels in November and December. Residents and visitors are strongly advised to take precautions during high-risk months (April through September) by wearing sunscreen, protective clothing, and seeking shade during peak sun hours to minimize the risk of skin damage.

Monthly Maximum UV Index for Date, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Date. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec235791010108632
Data source: Statistical UV Index data for Date, 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 Date UV Index with Other Japan Cities

The table above highlights how UV exposure in Date 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.
Date's solar exposure compared to other cities in Japan. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Sapporo UVI2367999108532
Date23579109108632
Yokohama UVI35891111111110754
Tokyo UVI35891111111110754
Nagoya UVI468101111111110753
Osaka UVI468111111121110753