UV Index in Ishiki, Japan

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors in Ishiki, Japan, where sunlight can be intense, particularly during the midday hours. With peak UV levels reaching as high as 11 in the summer months, awareness of UV conditions can significantly contribute to sunburn prevention and long-term skin health. The Cfa climate of Ishiki means warm summers, which brings an increased risk of UV exposure. By keeping an eye on the UV Index, you can make informed decisions about sun safety, ensuring that your outdoor activities remain enjoyable without compromising your skin's health.

Hourly UV Index in Ishiki

The UV Index throughout the day paints a vivid picture of sun intensity. Starting at a gentle 2 at 7:00 AM, it ramps up to a mild 4 by 8:00 AM. The heat intensifies, peaking at an impressive 11 around 12:00 PM, signaling the strongest exposure of the day. As the afternoon progresses, between 1:00 PM and 2:00 PM, it remains high at 10 and 8 respectively, before gradually tapering off. By 5:00 PM, the index drops back to a comfortable 2 and continues to decrease, reaching a minimal 0 by 7:00 PM. Remember to protect your skin especially during those peak hours for a safe and enjoyable day outdoors!

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
10:009very high15 min
11:0010very high15 min
12:0011extreme10 min
13:0010very high15 min
14:008very high15 min
15:005moderate30 min
16:003moderate30 min
17:002low45 min
18:001low45 min
19:000low45 min

Monthly UV Index Trends in Ishiki

Throughout the year, UV exposure varies significantly, with the highest risk typically occurring from March to September. During this period, the UV Index reaches its maximum, peaking at 12 in July, categorizing it as extreme, with a minimum burn time of just 10 minutes. April and May also present high-risk months, with UV Index values of 10 and 11, respectively. As a result, residents and visitors are advised to take precautions, including frequent application of sunscreen, wearing protective clothing, and seeking shade, particularly during midday hours when the sun's rays are strongest. In contrast, winter months see a decline in UV levels, with January to February falling into the moderate exposure category, while October provides a brief respite at a high level but still requires attention. Staying informed and proactive can help ensure safety from harmful UV radiation throughout the seasons.

Monthly Maximum UV Index for Ishiki, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Ishiki. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec458101111121110753
Data source: Statistical UV Index data for Ishiki, 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 Ishiki UV Index with Other Japan Cities

The table above highlights how UV exposure in Ishiki 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.
Ishiki's solar exposure compared to other cities in Japan. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Sapporo UVI2367999108532
Yokohama UVI35891111111110754
Tokyo UVI35891111111110754
Nagoya UVI468101111111110753
Ishiki458101111121110753
Osaka UVI468111111121110753