Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Barus, Indonesia, where the tropical climate can lead to high levels of sun exposure. Awareness of UV levels helps prevent sunburn and promotes long-term skin health, especially during the midday hours when the index peaks at a striking 13, indicating a high risk of harm from unprotected sun exposure. With Barus's typically warm and sunny weather, recognizing these UV risks is essential for enjoying the outdoors safely while protecting your skin from the sun’s damaging rays. Stay informed and stay safe!
As the sun rises, the UV Index starts its climb, reaching a maximum of 1 at 07:00. By 08:00, it gently escalates to 2, but it's at 09:00 that things heat up, skyrocketing to 4. The real intensity arrives by 10:00 with a peak of 7, but the sun's power truly hits its zenith at 11:00, soaring to 11. At 12:00, it reaches an impressive 13, before gradually tapering off throughout the afternoon. By 13:00, it dips to 12, then to 10 by 14:00, and further descends to 7 at 15:00. The sun's glare softens as we approach 16:00, with a 4 on the index, and by 17:00, we're back to 2. Finally, as night falls, the index drops to 1 by 18:00, and fades to 0 by 19:00, signaling the end of a sun-soaked day. Remember to protect your skin during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 10 | very high | 15 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 |
Throughout the year, UV Index values indicate an extreme risk of harm from unprotected sun exposure, particularly between January and October. The highest UV Index is recorded in March and April at 16, signaling these months as critical periods for potential sunburn, with a burn time of merely 10 minutes. While May to August maintains a consistent UV Index around 13 to 15, caution is still essential as these months also pose high risk. As the year progresses, September to November experiences slightly reduced levels, yet the UV Index remains at extreme levels around 14 to 15, reinforcing the need for protective measures. Residents and visitors are strongly advised to use sunscreen, wear protective clothing, and seek shade during peak sunlight hours to minimize the risk of UV-related health issues.
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 |
| Barus | 14 | 15 | 16 | 16 | 15 | 13 | 13 | 14 | 15 | 15 | 14 | 13 |