Last updated: June 2, 2025
In Ondong Siau, Indonesia, staying informed about the UV Index is crucial for protecting your skin from harmful sun exposure. Understanding UV levels helps you prevent painful sunburns and maintain long-term skin health, ensuring you enjoy the tropical climate without the risks associated with excessive UV radiation. With peak UV indexes of 12 and 13 between 12 PM and 1 PM, residents and visitors alike must be vigilant about sun safety during these hours. The predominantly warm and sunny Af climate further elevates these risks, making UV awareness an essential part of your daily routine in this beautiful island paradise.
As the day unfolds, the UV Index climbs steadily, peaking in the late morning. At 07:00, it starts at a mild 2, but by 08:00, it rises to 4, indicating a need for some sun protection. The index continues its ascent, reaching a significant 10 by 10:00, and peaks at a high of 13 at 12:00. This represents the most intense sun exposure, urging everyone to be cautious. The afternoon sees a gradual decline, with levels dropping to 7 at 14:00, and further decreasing to 4 by 15:00. As the sun begins its descent, the UV Index falls sharply, hitting 2 at 16:00, and then dwindling to 1 by 17:00 before settling at 0 after 18:00. This dynamic pattern highlights the importance of sun safety during peak hours, ensuring fun in the sun without the risks!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 10 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index remains consistently high, classified as extreme across all months, with minimal fluctuations. The highest values are recorded from February to March, peaking at 17 in March. Visitors and residents should be particularly cautious during these peak months, as the burn time is just 10 minutes, emphasizing the need for effective sun protection measures. Advising the application of broad-spectrum sunscreen, wearing protective clothing, and seeking shade when possible can help mitigate the risks associated with high UV exposure. Consistency in these practices is crucial throughout the year, as the risk of skin damage is significant even during the cooler months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Surabaya UVI | 13 | 15 | 14 | 12 | 12 | 10 | 11 | 12 | 14 | 13 | 13 | 13 |
| Bekasi UVI | 14 | 16 | 16 | 14 | 11 | 10 | 10 | 11 | 13 | 15 | 14 | 13 |
| Jakarta UVI | 14 | 16 | 16 | 14 | 11 | 10 | 10 | 11 | 13 | 15 | 14 | 13 |
| Medan UVI | 13 | 15 | 15 | 15 | 14 | 12 | 12 | 13 | 14 | 14 | 13 | 12 |
| Bandung UVI | 15 | 16 | 16 | 15 | 12 | 11 | 11 | 12 | 14 | 15 | 15 | 14 |
| Ondong Siau | 14 | 16 | 17 | 16 | 15 | 13 | 13 | 14 | 14 | 14 | 13 | 12 |