Last updated: June 2, 2025
In Kanoya, Japan, understanding the UV Index is crucial for safeguarding your skin health and preventing sunburn, especially given the region's Cfa climate, which often features warm summers with high sun exposure. The UV Index fluctuates throughout the day, peaking at an intensity of 12 around noon, highlighting the importance of being vigilant during mid-day hours. By staying informed about the UV levels, residents can take proactive measures to protect their skin from harmful ultraviolet rays and enjoy the sunny weather safely.
As the sun rises, the UV Index begins its ascent, starting at a modest 2 at 07:00. By 08:00, it reaches 3, signaling the start of a day filled with increasing sun intensity. The index climbs to 6 by 09:00, peaking dramatically at 12 during noon. Between 11:00 and 13:00, the UV Index hovers around a remarkable 11, emphasizing the need for protection against the sun’s rays. As the afternoon rolls on, values gradually decline, settling at 9 by 14:00 and then tapering off to 7 at 15:00. By late afternoon, the index drops to 4 at 16:00 and continues its descent to 1 by the evening, reminding us of the dynamic nature of sunlight throughout the day. Stay informed and protected during the peak hours!
| 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 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index fluctuates significantly, indicating varying levels of sun exposure risk. From January to February, the index increases from 5 (moderate risk) to 6 (high risk), suggesting a gradual need for sun protection. As spring approaches in March and April, the index peaks at 10 (very high risk), requiring increased caution. The summer months of May, June, July, and August reach their highest levels at 12 and 13 (extreme), with only 10 minutes of sun exposure before burning occurs. Although the UV index slightly decreases in September (11) and October (8), it remains high, continuing to warrant protective measures. The year concludes with a return to moderate levels in November (6) and December (5). Visitors and residents are advised to prioritize sun safety during the high-risk months from March through October, utilizing sunscreen, wearing protective clothing, and seeking shade during peak sunlight hours to minimize the risk of sunburn and long-term skin damage.
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 |
| Kanoya | 5 | 6 | 10 | 10 | 12 | 12 | 12 | 13 | 11 | 8 | 6 | 5 |