UV Index in Uwajima, Japan

Last updated: June 2, 2025

Awareness of the UV Index is crucial for residents and visitors in Uwajima, Japan, particularly during the region's warm, humid months. Understanding UV levels helps individuals take proactive steps to prevent sunburn and protect skin health, particularly during the peak hours of sunlight. Uwajima's Cfa climate means that UV exposure can reach significant levels, with indices peaking at 11 around noon. By staying informed about the daily UV Index, you can enjoy the beautiful outdoors while safeguarding your skin from harmful radiation.

Hourly UV Index in Uwajima

The hourly UV Index showcases a dynamic rise and fall throughout the day, peaking spectacularly around 11:00 AM and 12:00 PM, both hitting a maximum of 11, indicating a high risk of harm from unprotected sun exposure. As the day progresses, it starts at a gentle 2 at 07:00 AM, providing a calm introduction to the sun's intensity. By 9:00 AM, it reaches a moderate 6, and then scales up to its highest point by 10:00 AM with a reading of 9. As afternoon approaches, the index begins its decline, dropping to 6 at 15:00 PM before further easing into the evening with a 2 at 17:00 PM. By 18:00 PM and 19:00 PM, the UV levels settle at a safe 1, offering relief from the midday sun's intensity, making the late afternoon and evening much more inviting for outdoor activities. Stay sun-safe!

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
11:0011extreme10 min
12:0011extreme10 min
13:0011extreme10 min
14:009very high15 min
15:006high25 min
16:004moderate30 min
17:002low45 min
18:001low45 min
19:001low45 min

Monthly UV Index Trends in Uwajima

Throughout the year, the UV Index fluctuates significantly, with the highest risk occurring during the late spring and summer months. March through September marks the peak of UV exposure, particularly from May to August, when the UV Index reaches extremes of 12. During these high-risk months, recommended burn times can be as short as 10 minutes, highlighting the need for increased sun protection measures. Conversely, January, December, and early February see lower UV levels, categorized as moderate and high, allowing for more prolonged exposure, with burn times of 30 minutes in winter. Visitors and residents should remain vigilant during the high UV months by wearing protective clothing, using sunscreen, and seeking shade whenever possible, especially during midday hours when the sun's rays are the strongest.

Monthly Maximum UV Index for Uwajima, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Uwajima. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec469101211121211764
Data source: Statistical UV Index data for Uwajima, 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 Uwajima UV Index with Other Japan Cities

The table above highlights how UV exposure in Uwajima 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.
Uwajima'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
Osaka UVI468111111121110753
Uwajima469101211121211764