Last updated: July 2, 2025
Understanding the UV Index in Kumano, Japan is crucial for maintaining skin health and preventing sunburn. With the city experiencing a Cfa climate, residents and visitors alike face significant UV exposure, especially during peak hours. The UV levels can soar to a maximum of 12 around midday, highlighting the importance of awareness to protect yourself from harmful effects. Staying informed about these levels can help you enjoy the sun safely while minimizing risks associated with prolonged exposure. Remember, the sun's rays are more intense than they appear, so be proactive in safeguarding your skin in beautiful Kumano!
The UV Index climbs sharply as the day progresses, starting from a gentle 2 at 07:00 and peaking at a striking 12 between 11:00 and 12:00. This midday intensity indicates a significant risk of harm from unprotected sun exposure. As afternoon fades into evening, the index gradually decreases, dropping to 9 at 14:00, then settling at 6 by 15:00, and dwindling to 1 by 18:00. Finally, it reaches a 0 level by 19:00, making late evening a safer time to enjoy outdoor activities. Be sure to take precautions during peak hours to protect your skin from potential damage!
| 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 | 10 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index experiences significant fluctuations, with the highest risk months occurring from March to August, where it often reaches extreme levels. Notably, April, May, June, July, and August all register a UV Index of 12, indicating critical exposure levels with a burn time of only 10 minutes. Visitors and residents should take precautions during these months, such as wearing sunscreen, protective clothing, and seeking shade during peak sun hours. Conversely, from January to February and October to November, the UV levels are lower, categorized as moderate to high, allowing for a more comfortable outdoor experience, although caution is still advised. In December, the UV Index drops back to 4, reverting to a moderate category where burn time extends to 30 minutes, making it the safest month for outdoor activities. Overall, awareness of the UV Index can help individuals protect themselves from harmful sun exposure year-round.
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 |
| Kumano | 4 | 6 | 9 | 11 | 11 | 12 | 12 | 12 | 10 | 7 | 6 | 4 |