Last updated: July 2, 2025
Understanding the UV Index in Ishigaki, Japan is crucial for protecting your skin and overall health from the sun’s potentially harmful rays. With peak UV levels reaching up to 13 during midday hours, being aware of these readings can help prevent sunburn and reduce long-term skin damage. Ishigaki, characterized by its Cfa climate, experiences high UV exposure, particularly during the summer months. Staying informed about local UV levels is essential for enjoying the beautiful outdoors while safeguarding your skin’s health.
The UV Index for today tells a compelling story of sun intensity. Starting at a gentle 1 at 07:00, the sun's rays gradually strengthen, reaching a moderate level of 5 by 09:00. The peak intensity occurs between 12:00 and 13:00, where the Index soars to a striking 13, indicating a high risk of harm from unprotected sun exposure. As the day progresses, the UV levels begin to decline, dropping to 9 by 15:00 and tapering off to 3 by 17:00. Finally, the evening sees a return to mild conditions with a UV Index of 1 at 18:00 and 19:00. Be sure to take protective measures during the peak hours to enjoy the sunshine safely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 12 | extreme | 10 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences significant fluctuations throughout the year, peaking during the summer months. January and February start off with UV Index values of 8 and 10 respectively, which are classified as very high, with a burn time of just 15 minutes. The real danger begins in March and continues through August, where the UV Index maintains extreme levels of 12 to 13, allowing for a minimal burn time of just 10 minutes. This indicates that exposure during these months can lead to very rapid skin damage. September and October still present high risks with an Index of 10 and 9 as the burn times begin to increase, while November and December slightly decrease in risk with UV Index values of 9 and 7, leading to burn times of 15 and 25 minutes, respectively. Visitors and residents are strongly advised to take preventive measures, such as applying sunscreen, wearing protective clothing, and seeking shade during peak sunlight hours, especially from March through August. Staying informed about the UV Index can help minimize the risks associated with sun exposure and ensure safe outdoor activities.
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 |
| Ishigaki | 8 | 10 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 10 | 9 | 7 |