Last updated: May 3, 2025
Awareness of the UV Index is essential for residents and visitors of Muroto, Japan, where the sunny climate can pose significant risks for skin health. Understanding UV levels is crucial not only for preventing painful sunburns but also for protecting against long-term skin damage. With maximum UV values peaking at 11 during midday, Muroto's climate (Cfa) brings both beautiful weather and the need for vigilant sun protection. Stay informed and safeguard your skin while enjoying all the outdoor activities this stunning coastal town has to offer!
The UV Index shows a dynamic fluctuation throughout the day, peaking during the late morning to early afternoon hours. Starting at a mild 2 at 07:00, the index steadily rises, reaching a notable 11 by 11:00, where it remains steady through 12:00 and 13:00. This signifies a time of heightened sun intensity, urging outdoor enthusiasts to take precautions. As the afternoon progresses, the index begins to decline, dipping to 8 at 14:00 and further to 6 by 15:00. By the late afternoon, the UV levels drop significantly, finishing off the day with a gentle 0 at 19:00. Overall, the hourly data emphasizes the importance of sun safety during the mid-day peak hours.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
As the seasons change, so do the UV Index levels, significantly influencing sun exposure risk throughout the year. High-risk months are from March to August, when the UV Index peaks at 11 to 12, indicating extreme exposure with a burn time as short as 10 minutes. Particularly critical are May and July, when the UV Index consistently reaches its maximum. Conversely, the winter months of January and December present a moderate risk with an Index of 4, allowing for a safer exposure time of 30 minutes. To ensure safety, visitors and residents are advised to take precautions during high UV Index months by wearing sunscreen, protective clothing, and seeking shade, especially during midday hours when UV exposure is greatest.
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 |
| Osaka UVI | 4 | 6 | 8 | 11 | 11 | 11 | 12 | 11 | 10 | 7 | 5 | 3 |
| Muroto | 4 | 6 | 9 | 10 | 11 | 11 | 12 | 12 | 10 | 7 | 6 | 4 |