Last updated: June 2, 2025
In Gemuruh, Indonesia, understanding the UV Index is crucial for protecting your skin and overall health. With the region's tropical climate characterized by high UV exposure, being aware of UV levels can help prevent sunburn and long-term skin damage. Throughout the day, the UV Index can peak dramatically—from a moderate 3 in the morning to a severe 11 at midday. This makes it essential for residents and visitors alike to monitor these levels, ensuring safe sun habits and healthier skin all year round. Stay informed and safeguard your skin while enjoying the beautiful Indonesian sun!
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 in the region exhibits a striking consistency throughout the year, remaining at an extreme level of 11 to 16, with a burn time of just 10 minutes. The months of January through April start with a high index peaking in February and March at 16, indicating these winter months are particularly hazardous for sun exposure. As spring transitions to summer, the UV levels drop slightly but stay in the extreme category from May to August. A notable rise occurs again in September, before slightly decreasing as winter approaches, with October and November both at 15. Residents and visitors are urged to adopt protective measures year-round, particularly during the high-risk months from January to March, and to remain vigilant even during the late summer and autumn months. Always wear sunscreen, hats, and protective clothing when exposed to the sun for prolonged periods, and seek shade whenever possible.
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 |
| Gemuruh | 15 | 16 | 16 | 15 | 12 | 11 | 11 | 11 | 13 | 15 | 15 | 14 |
| Bandung UVI | 15 | 16 | 16 | 15 | 12 | 11 | 11 | 12 | 14 | 15 | 15 | 14 |