Last updated: July 2, 2025
Understanding the UV Index in Shinjo, Japan is crucial for promoting sun safety and skin health among residents and visitors alike. With high UV levels peaking at 11 around noon, awareness of UV exposure can help prevent painful sunburns and long-term skin damage. Shinjo's Cfa climate means that sun exposure risks are significant, particularly during the warmer months when UV radiation is at its highest. By monitoring the UV Index, you can take informed steps to protect your skin and enjoy the outdoor beauty of Shinjo safely.
The UV Index on this sunny day presents a compelling narrative of intensity and caution. Starting the morning gently at 2 by 7:00, the sun gradually escalates its strength, peaking at a robust 11 by 12:00. The midday hours are prime for sun-seekers, but with a UV Index hitting 10 at 11:00, it’s crucial to protect your skin. As the afternoon rolls in, the intensity diminishes, dipping to 5 by 15:00 and falling even lower to 1 by 17:00, making late afternoon and evening more suitable for outdoor activities without as much risk. However, as dusk approaches, the UV Index plunges to 0 by 19:00, marking a safe end to sun exposure. Embrace the sunshine wisely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, seasonal changes in the UV Index indicate varying levels of sun exposure risk. The high-risk months are primarily from April to August, where the UV Index peaks at 9-11 and exposure category ranges from very high to extreme, resulting in a burn time as short as 10 minutes during July and August. In contrast, the winter months of January, February, November, and December feature a moderate UV Index of 3-4, with a longer burn time of 30 minutes. Residents and visitors should take precautions during the high-risk months, such as seeking shade, wearing protective clothing, and using sunscreen, especially between 11 AM and 4 PM when the sun’s rays are most intense. As sun exposure can lead to skin damage, being cautious during peak UV periods is essential for maintaining skin health.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sapporo UVI | 2 | 3 | 6 | 7 | 9 | 9 | 9 | 10 | 8 | 5 | 3 | 2 |
| Shinjo | 3 | 4 | 7 | 9 | 9 | 10 | 11 | 11 | 9 | 6 | 4 | 3 |
| Yokohama UVI | 3 | 5 | 8 | 9 | 11 | 11 | 11 | 11 | 10 | 7 | 5 | 4 |
| Tokyo UVI | 3 | 5 | 8 | 9 | 11 | 11 | 11 | 11 | 10 | 7 | 5 | 4 |
| Nagoya UVI | 4 | 6 | 8 | 10 | 11 | 11 | 11 | 11 | 10 | 7 | 5 | 3 |
| Osaka UVI | 4 | 6 | 8 | 11 | 11 | 11 | 12 | 11 | 10 | 7 | 5 | 3 |