Last updated: June 2, 2025
Being aware of the UV Index is crucial for residents and visitors of Rancaerang, Indonesia, where the tropical climate can lead to significant sun exposure. Understanding UV levels is essential for protecting your skin and preventing sunburn, which can have long-term implications for your health. With maximum UV Index readings peaking at 11 around noon, it’s vital to know when to seek shade and apply sunscreen. Rancaerang’s hot and humid conditions make it even more important to stay informed about UV risks, ensuring you can enjoy the sun while keeping your skin safe.
As the sun rises, the UV Index starts off low at 1 at 7:00 AM, slowly increasing to 3 by 8:00 AM. By 9:00 AM, it reaches 5, suggesting that the rays are becoming more intense. The peak arrives at 12:00 PM, where a high of 11 is recorded, indicating a very high risk of harm from unprotected sun exposure. The afternoon still holds lingering rays, with values descending gradually from 9 at 1:00 PM to 4 by 3:00 PM. As the sun begins to set, the index drops sharply to 2 at 4:00 PM, and ultimately to 0 after 6:00 PM. Remember, during the peak hours, especially between 10:00 AM and 2:00 PM, protecting your skin is essential!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 9 | 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 |
The UV Index experiences notable seasonal changes, remaining consistently high throughout the year. January to April sees a UV Index ranging from 15 to 16, classified as extreme, indicating a burn time of just 10 minutes. As we move into May and June, the index slightly decreases to 13 and 11, respectively, but still falls within the extreme category. July and August maintain this moderate level, before increasing again to 15 in September and October. Notably, November also returns to a UV Index of 15, tapering off slightly in December with an index of 14. The high-risk months for UV exposure are from January to October, where the potential for sunburn is critically high. Visitors and residents are advised to take precautionary measures, such as wearing protective clothing, applying broad-spectrum sunscreen, and minimizing sun exposure during peak hours to protect against harmful UV radiation.
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 |
| Rancaerang | 15 | 16 | 16 | 15 | 13 | 11 | 11 | 13 | 15 | 15 | 15 | 14 |