Last updated: May 3, 2025
Understanding the UV Index in Hamada, Japan is crucial for protecting your skin from harmful ultraviolet radiation. With UV levels peaking at 10 during midday hours, awareness of these levels can significantly aid in preventing sunburn and maintaining long-term skin health. Given Hamada's Cfa climate, characterized by warm summers and moderate rainfall, residents and visitors alike must stay vigilant about UV exposure, especially during the sun’s most intense hours. Prepare yourself with the right knowledge to enjoy the sun safely!
As the sun rises at 07:00, the UV Index starts low at 2, but by 08:00, it gently climbs to 3. The intensity ramps up as the day progresses, peaking dramatically at 11:00, hitting an impressive 10. This level of UV radiation remains steady through 12:00 and 13:00, urging sun lovers to take precautions. By 14:00, the index begins to decline, easing to 8 at 15:00. As evening approaches, the UV Index drops more swiftly, settling back to 3 by 16:00 and tapering off to 2 at 17:00, before winding down to 1 by 18:00 and 19:00. Stay sun-safe and enjoy the beautiful daylight, but remember to protect your skin during those 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 | 10 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 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 | 1 | low | 45 min |
As the seasons change, so does the UV Index, with significant increases in the spring and summer months that pose heightened risks for sun exposure. From March to August, the UV Index escalates sharply, peaking at 12 in July and August, categorizing this period as extreme with a burn time of just 10 minutes. Consequently, the high-risk months for UV exposure are March through August. During these months, it is essential for both visitors and residents to take precautionary measures, such as wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade to minimize potential sunburn and long-term skin damage. In contrast, the UV Index is lower in the winter months, such as January and December, but caution is still advised even when the index is moderate, especially in sunny conditions.
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 |
| Hamada | 4 | 5 | 8 | 10 | 10 | 11 | 12 | 12 | 10 | 7 | 5 | 3 |
| 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 |