Last updated: May 3, 2025
In Otofuke, Japan, understanding the UV Index is crucial for protecting your skin from harmful sun exposure. With a continental climate that brings a range of temperatures and sunny days, residents and visitors alike must stay informed about UV levels to prevent sunburn and promote long-term skin health. During peak hours, particularly between 11:00 AM and 1:00 PM, the UV Index can reach a high of 9, indicating a significant risk of harm from unprotected sun exposure. By keeping an eye on the UV Index, residents can take proactive measures to enjoy the outdoors while safeguarding their skin from the sun's harsh effects.
As the sun rises, the UV Index begins its ascent, peaking at 9 between 11:00 AM and 12:00 PM, indicating a high risk of harm from unprotected sun exposure. Early risers will find a more manageable 3 at 7:00 AM, but as the day progresses, the intensity escalates, reaching a robust 8 by 10:00 AM and hitting its zenith with a 9 at noon. A gradual decline follows, with values decreasing to 7 at 1:00 PM, and dipping further to 4 by 3:00 PM. As evening approaches, the UV levels drop sharply, falling to 1 by 5:00 PM and fading to 0 by 7:00 PM. It's a day that reminds us to be vigilant under the sun's powerful rays, especially during the midday hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 3 | moderate | 30 min |
| 08:00 | 5 | moderate | 30 min |
| 09:00 | 7 | 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 | 7 | high | 25 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV exposure levels fluctuate significantly, with the highest risks occurring during the summer months of June, July, and August when the UV Index peaks at 10 and the exposure category is classified as very high. During these months, the burn time is notably reduced to just 15 minutes, indicating the need for diligent sun protection. In contrast, the beginning and end of the year (January and December) feature low UV levels, with an index of 2 and burn times up to 45 minutes. Residents and visitors alike are advised to be particularly cautious from April through September when the UV index ranges from 8 to 10. It's crucial to take preventive measures such as wearing sunscreen, protective clothing, and seeking shade to minimize the risk of sunburn and long-term skin damage during high UV 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 |
| Otofuke | 2 | 3 | 5 | 8 | 9 | 10 | 10 | 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 |