Last updated: May 3, 2025
In Ishigaki, Japan, staying informed about the UV Index is crucial for protecting your skin and overall health. As you explore this stunning tropical island, understanding the varying levels of UV exposure can help you avoid sunburns and potential long-term skin damage. With a Cfa climate that boasts warm temperatures year-round, Ishigaki experiences significant UV risks, particularly between 10 AM and 2 PM, when the index peaks at a striking 12. By being aware of the UV levels, you can enjoy the sun safely while savoring all that this paradise has to offer.
As the sun rises, the UV Index begins its ascent, starting at a mild 1 at 07:00 and gently climbing to 2 by 08:00. The warmth of midday brings a significant surge, with the index peaking at a striking 12 between 12:00 and 13:00—a reminder to stay protected with sunscreen and hats! As the afternoon progresses, the levels gradually decline, dropping to 8 by 15:00 and further easing back to 1 by the time the sun sets at 19:00. This hourly fluctuation highlights the importance of being mindful of UV exposure, especially during those peak hours when the sun’s rays are strongest!
| 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 | 12 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 2 | low | 45 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 |