Last updated: May 3, 2025
Understanding the UV Index in Sakaidecho, Japan is crucial for safeguarding your skin health throughout the year. With peak UV levels reaching a high of 11 around noon, awareness of these daily fluctuations can significantly reduce the risk of sunburn and long-term skin damage. Given Sakaidecho's temperate climate, typical summer days can expose residents and visitors to higher-than-average UV radiation, making it essential to stay informed and protected. By checking the UV Index regularly, you can enjoy the outdoors safely, ensuring that your sun-kissed adventures remain healthy and carefree.
The UV Index early in the day starts off modest, peaking at 2 by 07:00 and climbing to a moderate 3 by 08:00. By 09:00, it surges to a robust 6, indicating increasing sun intensity. The heat reaches its zenith at 12:00, hitting an impressive 11, showing that midday is the prime time for sun exposure. As the afternoon progresses, the UV Index gradually declines, falling to 10 at 13:00, then to 8 by 14:00. By late afternoon, 15:00 sees it drop to 6, and as the sun sets, the index continues to taper off, descending to 3 by 16:00, and eventually settling at a low 0 by 19:00. It’s a day that underscores the importance of sun protection during peak hours, especially around noon.
| 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 | 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 |
From January to December, UV Index values exhibit significant seasonal changes, peaking during the summer months. January and December maintain a moderate UV Index of 4, allowing for a burn time of 30 minutes. As spring arrives, March sees a notable increase to 8 (very high), reducing burn time to 15 minutes. The peak UV exposure occurs from May through August, where the index reaches a maximum of 12 (extreme), necessitating a burn time as brief as 10 minutes. September begins a gradual decline, returning to a very high level of 10, while October and November drop to moderate levels at 5. Visitors and residents should exercise caution from March to August, particularly during these high-risk months, by wearing protective clothing, applying sunscreen frequently, and seeking shade to limit UV exposure.
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 |
| Sakaidecho | 4 | 5 | 8 | 10 | 11 | 11 | 12 | 12 | 10 | 7 | 5 | 4 |
| Osaka UVI | 4 | 6 | 8 | 11 | 11 | 11 | 12 | 11 | 10 | 7 | 5 | 3 |