Last updated: May 3, 2025
In Soja, Japan, being aware of the UV Index is crucial for protecting your skin and maintaining overall health. Understanding UV levels is key to preventing sunburn and reducing the risk of long-term skin damage. With a Cfa climate that brings both sunny days and increased UV exposure, locals and visitors alike should be especially cautious during peak hours, particularly between 10 AM and 2 PM, when the UV Index can soar to levels 10 and 11. By staying informed about the UV Index, you can enjoy the beautiful outdoors of Soja while safeguarding your skin from harmful effects.
As the day unfolds, the UV Index begins its ascent, signaling the need for sun protection. Starting at a mild 2 at 07:00, it climbs steadily, reaching 3 by 08:00. The real intensity kicks in by 09:00, peaking at a striking 11 by noon. This is the moment when overexposure can become a concern, urging everyone to slather on that sunscreen. For the rest of the afternoon, the UV Index remains high until 15:00, when it gradually declines, settling back to a safe 2 by 17:00. As daylight wanes, the risks diminish with the index dropping to a mere 1 by 19:00. It’s a vivid reminder of the sun's power—choose your outdoor activities wisely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the year progresses, UV index levels exhibit notable seasonal changes, peaking during the summer months. Specifically, May through August are highlighted as high-risk months, where the UV index reaches extreme levels (11-12), resulting in a quick burn time of just 10 minutes. In contrast, levels decline through late autumn and winter, with January and December showing moderate levels (UV Index 4) and a burn time of 30 minutes. Visitors and residents should be particularly cautious during the spring and summer, seeking shade, wearing protective clothing, and applying high-SPF sunscreen to minimize the risk of skin damage. It's essential to stay informed and take proactive steps to protect against harmful UV exposure during the high-risk months.
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 |
| 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 |
| Soja | 4 | 6 | 8 | 10 | 11 | 11 | 12 | 12 | 10 | 7 | 5 | 4 |
| Osaka UVI | 4 | 6 | 8 | 11 | 11 | 11 | 12 | 11 | 10 | 7 | 5 | 3 |