Last updated: July 2, 2025
Understanding the UV Index in Tobetsu, Japan is crucial for protecting your skin from harmful UV radiation. With the area experiencing a Dfb climate, residents and visitors alike face potential sunburn and long-term skin health risks, especially during the peak hours of UV exposure. Knowing the UV levels, which can soar to 9 around midday, empowers you to take necessary precautions and enjoy the outdoors while safeguarding your skin. Stay informed and keep your summer adventures safe by checking the UV Index regularly!
As the day unfolds, the UV Index reaches its peak around 11:00 AM and 12:00 PM, soaring to a notable 9—a clear signal for sun protection. The morning starts gently, with values of 3 at 7:00 AM rising steadily to 6 by 9:00 AM. By 10:00 AM, the intensity escalates to 8, urging outdoor enthusiasts to take precautions. The afternoon sees a slight decline, dropping to 5 at 3:00 PM, and further to 3 by 4:00 PM, before settling at a low of 1 after 5:00 PM. Keeping an eye on these fluctuations is crucial for safe sun exposure throughout the day!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 3 | moderate | 30 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 8 | 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 | 1 | low | 45 min |
The UV Index shows a clear seasonal variation, with high-risk months from March to September, where values peak at 10 in August. January and December experience low exposure with a UV Index of 2, while February and November have moderate exposure with an index of 3. During April and May, the UV Index rises significantly, reaching very high levels of 8 and 9, meaning a burn time of just 15 minutes is recommended during peak intensity months. Visitors and residents should take precautions from March through September, especially midday, to protect their skin, including wearing sunscreen, protective clothing, and seeking shade. As UV levels drop in the fall and winter, there is less risk, but some protection is still advisable in February and October.
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 |
| Tobetsu | 2 | 3 | 6 | 7 | 8 | 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 |
| Osaka UVI | 4 | 6 | 8 | 11 | 11 | 11 | 12 | 11 | 10 | 7 | 5 | 3 |