UV Index in Sapporo, Japan

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors of Sapporo, Japan, particularly as the region experiences varying levels of sun exposure throughout the year. With peak UV levels reaching up to 9 during midday, awareness of these fluctuations is essential for preventing sunburn and protecting skin health. Given Sapporo's Dfb climate, characterized by cold winters and warm summers, awareness of UV risks, especially during sunny days, can help you enjoy the outdoors safely and maintain your overall well-being. By staying informed about the UV Index, you can take proactive measures to shield yourself from harmful rays and make the most of Sapporo’s beautiful scenery.

Hourly UV Index in Sapporo

The UV Index steadily climbs throughout the morning, peaking at 9 between 11:00 and 12:00, indicating intense sun exposure that requires caution. As the day progresses, the index begins to decline, dropping to 7 by 14:00 and further decreasing to 5 by 15:00. By late afternoon, the UV levels drop significantly, reaching 1 by 16:00 and remaining low until sunset. It's crucial to stay protected during the midday hours when the UV Index is at its highest; wearing sunscreen and protective clothing is highly recommended to enjoy safe outdoor activities!

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
09:007high25 min
10:008very high15 min
11:009very high15 min
12:009very high15 min
13:008very 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 Sapporo

Throughout the year, the UV Index experiences notable seasonal changes, indicating varying levels of sun exposure risk. The high-risk months typically occur from May to August, when the UV Index reaches very high levels (9-10), warranting caution as the burn time decreases to just 15 minutes. In contrast, the winter months of December and January present a much lower risk, with UV indexes of 2 and burn times extending to 45 minutes. Visitors and residents are advised to take appropriate precautions during the high-risk months, such as wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade during peak sun hours to minimize potential skin damage. For the moderate months of February, April, October, and November, it’s important to remain aware of UV exposure and adjust outdoor activities accordingly.

Monthly Maximum UV Index for Sapporo, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Sapporo. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec2367999108532
Data source: Statistical UV Index data for Sapporo, 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 Sapporo UV Index with Other Japan Cities

The table above highlights how UV exposure in Sapporo 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.
Sapporo's solar exposure compared to other cities in Japan. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Sapporo2367999108532
Yokohama UVI35891111111110754
Tokyo UVI35891111111110754
Nagoya UVI468101111111110753
Osaka UVI468111111121110753