UV Index in Mutsu, Japan

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors in Mutsu, Japan, where the unique climate can lead to varying levels of sun exposure throughout the day. With peak UV levels reaching 10 around midday, being aware of these fluctuations is essential for sunburn prevention and maintaining skin health. Mutsu's humid continental climate (Dfb) means that while summers can bring higher UV risks, it's important to stay informed year-round. By monitoring the UV Index, you can better protect your skin against harmful rays and enjoy the beautiful outdoors safely.

Hourly UV Index in Mutsu

The UV Index for the day starts off gently at 3 by 7:00 AM, gradually elevating as the sun climbs higher in the sky. By 9:00 AM, it reaches 7, signaling the onset of stronger rays. The peak occurs between 11:00 AM and 12:00 PM, where it hits a maximum of 10, indicating a high risk of harm from unprotected sun exposure. As the afternoon progresses, the index starts to decline, dipping to 5 by 3:00 PM and further to 1 by 5:00 PM, leading to a comfortable evening. As night falls at 7:00 PM, the UV index drops to 0, marking the end of sun-related concerns for the day. Remember to take precautions during peak hours to protect your skin!

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
10:009very high15 min
11:0010very 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
19:000low45 min

Monthly UV Index Trends in Mutsu

The UV Index varies significantly throughout the year, reflecting seasonal changes in sun exposure. High-risk months for UV radiation include late spring and summer, specifically from April to August, when levels reach very high to extreme ratings, making burn times as low as 10 to 15 minutes. Visitors and residents should be particularly vigilant during these months; protective measures, such as wearing sunscreen, hats, and sunglasses, are essential. January through March and October exhibit moderate to high UV levels, where burn times range from 25 to 30 minutes, while November and December present lower UV risks with longer burn times of 30 to 45 minutes. It’s advisable to monitor local UV forecasts and adjust outdoor activities accordingly to minimize skin damage.

Monthly Maximum UV Index for Mutsu, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Mutsu. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec345891010118632
Data source: Statistical UV Index data for Mutsu, 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 Mutsu UV Index with Other Japan Cities

The table above highlights how UV exposure in Mutsu 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.
Mutsu's solar exposure compared to other cities in Japan. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Sapporo UVI2367999108532
Mutsu345891010118642
Yokohama UVI35891111111110754
Tokyo UVI35891111111110754
Nagoya UVI468101111111110753
Osaka UVI468111111121110753