UV Index in Hokuto, Japan

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors of Hokuto, Japan, where the combination of a Dfb climate and varying solar exposure can lead to significant sunburn and long-term skin health risks. The UV Index reaches its peak at midday with levels soaring to 9, indicating a very high risk of harm from unprotected sun exposure. By keeping track of these levels, individuals can take proactive measures to protect their skin and enjoy the beautiful outdoor activities that Hokuto offers, especially in summer when UV exposure is at its highest. Awareness of the UV Index helps safeguard against the harmful effects of the sun, ensuring that your adventures in this stunning region remain both enjoyable and safe.

Hourly UV Index in Hokuto

As the sun rises, the UV Index begins its ascent, peaking at 11:00 AM and 12:00 PM with a blistering 9. The day starts gently, with 07:00 AM registering a modest 2, but by 09:00 AM, it climbs to a moderate 6. The intensity escalates, hitting 8 at 10:00 AM and reaching its zenith shortly after noon. After this peak, the index gradually dips, easing down to 6 by 2:00 PM, before falling further to 4 at 3:00 PM. As evening approaches, the UV radiation wanes significantly, dropping to 2 by 4:00 PM and near zero after sunset, signaling a shift in the skies. Remember to protect your skin during those peak hours!

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
09:006high25 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 Hokuto

Throughout the year, UV index levels fluctuate significantly, indicating varying risks for sun exposure. January and December see low UV levels (Index 2), with extended burn times of 45 minutes, making sun safety less of a concern. In contrast, April to August marks a critical period with very high to extreme UV levels (Indexes 8 to 11) that dramatically decrease safe burn times to 15 minutes in April to July and just 10 minutes in August. May and June particularly stand out as high-risk months. As summer transitions into early fall, UV levels moderately decline but remain a risk with levels still at 8 in September, requiring continued vigilance. For optimal sun safety, visitors and residents are advised to monitor the UV index, especially during the high-risk months of April to August, adopting protective measures such as sunscreen, clothing, and shade to mitigate exposure.

Monthly Maximum UV Index for Hokuto, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Hokuto. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec235891010118632
Data source: Statistical UV Index data for Hokuto, 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 Hokuto UV Index with Other Japan Cities

The table above highlights how UV exposure in Hokuto 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.
Hokuto's solar exposure compared to other cities in Japan. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Sapporo UVI2367999108532
Hokuto235891010118632
Yokohama UVI35891111111110754
Tokyo UVI35891111111110754
Nagoya UVI468101111111110753
Osaka UVI468111111121110753