Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Kumai, Indonesia, a beautiful location characterized by its tropical climate. Elevated UV levels, especially between 10 AM and 2 PM, can pose significant risks for skin health, leading to sunburn and long-term damage. With the UV Index reaching as high as 12 during peak hours, being aware of these levels is essential for effective sun protection and minimizing harmful exposure. By staying informed about UV trends, you can enjoy the sunshine while safeguarding your skin against its harsh effects, making your experience in sunny Kumai both enjoyable and safe.
The UV Index throughout the day reveals a striking fluctuation in sun intensity. Starting at a modest 1 by 07:00, the index quickly rises as the sun ascends, hitting 4 by 08:00. As the clock strikes 09:00, we reach a 7, but it’s between 10:00 and 12:00 that we experience the peak, with the index soaring to an impressive 12. Gradually, the intensity begins to wane; by 13:00, it drops to 10, and further declines to 4 by 15:00. The sun's power diminishes steadily, settling back to 1 by 17:00 and finally reaching 0 after 18:00, inviting a gentle close to the day. With this data, it's clear that the midday hours are the best time to be cautious when exposed to the sun!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | 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 | 12 | extreme | 10 min |
| 13:00 | 10 | very high | 15 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, UV Index levels remain consistently high, categorizing the exposure as extreme. Notably, from February to April, the UV Index peaks at 16, indicating a significant risk of skin damage with a burn time of just 10 minutes. As summer approaches, the index slightly declines to 12-13 in June through August but remains in the extreme category. In the fall, the UV Index rises again to 15 in September and October before tapering off slightly in November and December. Given this information, it is crucial for both visitors and residents to take protective measures against UV exposure, especially during the high-risk months of February through April. It is recommended to utilize sunscreen, wear protective clothing, and seek shade whenever possible to minimize the risk of skin damage throughout the year.
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 |
| Kumai | 14 | 16 | 16 | 14 | 14 | 12 | 12 | 13 | 15 | 15 | 14 | 13 |