Last updated: June 2, 2025
Understanding the UV Index in Hamada, Japan is essential for safeguarding your skin against harmful ultraviolet rays. With the UV exposure peaking at 11 during midday, awareness of these levels is crucial for preventing sunburn and maintaining long-term skin health. The Cfa climate of Hamada, characterized by hot summers and mild winters, accompanies a consistent risk of increased UV radiation, making it vital for residents and visitors alike to stay informed and take necessary precautions. Whether you're enjoying outdoor activities or simply basking in the sun, knowing the UV Index can help protect your skin from potential damage.
The UV Index throughout the day reveals a striking pattern of sun exposure. Starting at 7:00 AM, the index registers a modest 2, gradually rising to 3 at 8:00 AM. As the sun climbs higher, the index surges to 6 by 9:00 AM and peaks impressively at 11:00 AM with a notable 10. The zenith of solar intensity occurs at 12:00 PM, reaching a high of 11—a clear reminder of the sun’s strength. The afternoon sees a slight decline, with values at 10 at 1:00 PM and dropping to 9 by 2:00 PM. As the day winds down, the UV Index dips to 6 at 3:00 PM, further decreasing to 4 at 4:00 PM. By 5:00 PM, it sinks to 2 and finally settles at a low of 1 by 6:00 PM, marking the end of a day filled with fluctuating UV exposure.
| 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 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 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 | 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 |