Last updated: August 1, 2025
Understanding the UV Index is crucial for residents and visitors in Simpang Ulim, Indonesia, where the tropical climate brings intense sunlight year-round. With peak UV levels often reaching as high as 12 during midday, awareness of these numbers isn't just about sunburn prevention; it’s vital for maintaining long-term skin health. By familiarizing yourself with the day’s UV levels, you can better protect yourself against damaging rays and make informed decisions about outdoor activities. Given the region's typical climate and its associated UV exposure risks, staying informed about the UV Index can be a key step toward enjoying the sun safely.
As the sun climbs higher in the sky, the UV Index surges, peaking at a sweltering 12 around noon. Early morning hours start off with a manageable index, registering only 1 at 7:00 and gradually rising to 4 by 9:00. However, the real intensity hits between 11:00 and 13:00, where it reaches its maximum of 12, signaling a critical period for sun exposure. As the afternoon wanes, the index begins to decline, dropping to 7 by 15:00 and tapering off to 1 by 18:00. Finally, after 19:00, it dips to a 0, marking a safe window for those looking to escape the sun’s harmful rays. Stay protected during peak hours for a safer and more enjoyable outdoor experience!
| 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 | 13 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index remains notably high throughout the year, with values ranging from 12 to 15, indicating an extreme exposure category, particularly in the first few months of the year. January through April are marked as the highest risk months, all recording a UV Index of either 15 or 14, requiring vigilance to prevent sunburn in just 10 minutes of exposure. While the UV Index slightly decreases in the summer months, July and August still maintain high levels at 12 and 13, respectively. Visitors and residents are strongly advised to protect themselves from sun exposure by wearing sunscreen, protective clothing, and seeking shade during peak sunlight hours, especially from January through September when the UV levels pose significant risk for skin damage.
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 |
| Simpang Ulim | 13 | 15 | 15 | 15 | 14 | 13 | 12 | 13 | 14 | 14 | 13 | 12 |
| Bandung UVI | 15 | 16 | 16 | 15 | 12 | 11 | 11 | 12 | 14 | 15 | 15 | 14 |