UV Index in Honcho, Japan

Last updated: May 3, 2025

Understanding the UV Index in Honcho, Japan is crucial for maintaining skin health and preventing dangerous sunburns. With the region's Dfb climate—characterized by distinct seasonal variations—UV exposure can significantly fluctuate throughout the year. On sunny days, UV levels can peak as high as 9 between 11 AM and 1 PM, making awareness essential for safe outdoor activities. Staying informed about the UV Index helps residents and visitors alike to take necessary precautions, protecting their skin from the harmful effects of excessive sun exposure while enjoying the beautiful landscapes Honcho has to offer.

Hourly UV Index in Honcho

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 Honcho

Throughout the year, UV radiation levels change significantly, affecting the risk of sunburn for visitors and residents. The highest UV Index occurs during August, with an extreme rating of 11, resulting in a rapid burn time of just 10 minutes. From April to September, UV exposure is particularly hazardous, with several months categorized as very high to extreme. Notable high-risk months include April (UV Index 8), May (UV Index 9), and June and July (UV Index 10), all requiring vigilant sun protection measures. Residents and visitors are advised to limit sun exposure, especially during peak hours, seek shade, and wear protective clothing and sunscreen to safeguard against harmful UV rays. As the year progresses into fall and winter, the UV Index decreases, offering more manageable levels of exposure, but caution is still advised during the transitional months of October (UV Index 6) and November (UV Index 3).

Monthly Maximum UV Index for Honcho, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Honcho. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec245891010118632
Data source: Statistical UV Index data for Honcho, 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 Honcho UV Index with Other Japan Cities

The table above highlights how UV exposure in Honcho 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.
Honcho's solar exposure compared to other cities in Japan. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Sapporo UVI2367999108532
Honcho245891010118632
Yokohama UVI35891111111110754
Tokyo UVI35891111111110754
Nagoya UVI468101111111110753
Osaka UVI468111111121110753