UV Index in Kamaishi, Japan

Last updated: May 3, 2025

Understanding the UV Index in Kamaishi, Japan is crucial for protecting your skin and maintaining overall health. With UV levels that peak at a high of 9 during midday, awareness of these levels can help prevent painful sunburn and reduce long-term skin damage. Kamaishi's temperate Cfb climate offers plenty of sunny days, making it essential for residents and visitors alike to stay informed about daily UV exposure risks. By monitoring the UV Index, you can enjoy the outdoors safely while safeguarding your skin against harmful UV radiation.

Hourly UV Index in Kamaishi

Throughout the day, the UV Index begins its ascent at 07:00 with a moderate reading of 3, but by 10:00, it peaks at an impressive 9, signaling that sun protection is crucial. The intensity remains high from 11:00 to 12:00, sustaining another peak of 9 before slowly declining throughout the afternoon. By 14:00, the index drops to 6, transitioning to a gentler level as it moves toward the evening. As the sun sets, the index dwindles to 1 by 17:00 and reaches a comfortable 0 by 19:00. It’s a dynamic day of sun exposure, making the mid-morning to early afternoon the perfect time to stay vigilant about UV protection!

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
08:005moderate30 min
09:007high25 min
10:008very high15 min
11:009very high15 min
12:009very high15 min
13:008very high15 min
14:006high25 min
15:004moderate30 min
16:002low45 min
17:001low45 min
18:001low45 min
19:000low45 min

Monthly UV Index Trends in Kamaishi

As the seasons change, so do the UV Index levels, indicating varying levels of sun exposure risk throughout the year. From January to February, the UV Index remains moderate (3 to 4), with a burn time of 30 minutes. However, March marks the beginning of high-risk months, as the index rises to 6 (high) with a reduced burn time of 25 minutes. April sees a significant jump to 8 (very high), while May peaks at 9, both months requiring protective measures within 15 minutes of sun exposure. The summer months of June and July are especially concerning, with June reaching an extreme UV Index of 11 and July at 10, where a brief 10 to 15 minutes can lead to burns. Throughout August and September, the index remains high (10 and 9 respectively), before declining in October to a more manageable 6 (high) and returning to moderate levels in November and December. Visitors and residents alike should exercise caution, especially during the late spring and summer months, by wearing protective clothing, using sunscreen, and seeking shade to minimize UV damage.

Monthly Maximum UV Index for Kamaishi, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Kamaishi. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec346991110109643
Data source: Statistical UV Index data for Kamaishi, 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 Kamaishi UV Index with Other Japan Cities

The table above highlights how UV exposure in Kamaishi 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.
Kamaishi's solar exposure compared to other cities in Japan. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Sapporo UVI2367999108532
Kamaishi346891110109643
Yokohama UVI35891111111110754
Tokyo UVI35891111111110754
Nagoya UVI468101111111110753
Osaka UVI468111111121110753