UV Index in Kuji, Japan

Last updated: May 3, 2025

Understanding the UV Index in Kuji, Japan is crucial for safeguarding your skin from harmful ultraviolet radiation. With the city's climate characterized by mild summers and wet winters, it’s essential for residents and visitors alike to be aware of UV levels. High UV readings, particularly from 10 AM to 2 PM, can lead to sunburn and long-term skin damage, making it vital to take precautions. On peak days, the UV Index can reach as high as 9, signaling the need for effective sun protection measures. Stay informed and protect your skin to enjoy the beautiful outdoors of Kuji safely!

Hourly UV Index in Kuji

As the sun rises, the UV Index gradually increases, starting at a mild 3 around 07:00. By 08:00, it reaches 4, indicating a moderate risk of harm from unprotected sun exposure. The intensity peaks at 09:00 with a 6, then skyrockets to an impressive 8 by 10:00. The sun hits its zenith at 11:00 and 12:00, both boasting a maximum of 9, presenting a high risk for those outdoors. As the afternoon progresses, the UV Index begins to decline, gently falling to 6 by 14:00, and continuing downward to 4 at 15:00. By 16:00, it drops further to 2, and as the day winds down, the index settles at a minimal 1 by 17:00 and remains low until 19:00, when it finally hits 0. It’s essential to stay sun smart, especially during those peak hours when the UV Index is at its highest!

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
09:006high25 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 Kuji

Throughout the year, UV radiation levels experience significant seasonal variation, peaking during the summer months. January and December have a low UV Index of 2, allowing for an extended burn time of 45 minutes. However, as early as February, the UV Index rises to 3 (moderate), reducing the burn time to 30 minutes. March introduces a high risk with a UV Index of 6, and by April and May, it escalates to 8 and 9 respectively, both categorized as very high, with a critical burn time of just 15 minutes. The peak occurs in August, where the UV Index reaches an extreme level of 11, permitting only 10 minutes of exposure before risking sunburn. As we transition into fall, the UV levels moderate slightly, but September remains high at 9, before dropping back to a high index of 6 in October. As a precaution, visitors and residents should prioritize sun protection from March through September, particularly during the summer months when the risk of harm is greatest, and always use sunscreen, wear protective clothing, and seek shade during peak hours.

Monthly Maximum UV Index for Kuji, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Kuji. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec246891010119642
Data source: Statistical UV Index data for Kuji, 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 Kuji UV Index with Other Japan Cities

The table above highlights how UV exposure in Kuji 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.
Kuji's solar exposure compared to other cities in Japan. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Sapporo UVI2367999108532
Kuji236891010119642
Yokohama UVI35891111111110754
Tokyo UVI35891111111110754
Nagoya UVI468101111111110753
Osaka UVI468111111121110753