Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Watuliwung, Indonesia, where the tropical climate brings intense sunshine and elevated UV levels. With peak UV Index values reaching as high as 12 under the midday sun, it's essential to stay informed about daily UV exposure to prevent sunburn and protect your long-term skin health. Being aware of these fluctuating levels can help you make smart choices about sun safety, ensuring your time outdoors is enjoyable and safe. Watuliwung's climate, classified as tropical, poses significant risks, particularly between 10 AM and 2 PM, when UV radiation is at its strongest. Stay informed to enjoy the vibrant outdoor life this beautiful region offers!
The UV Index throughout the day exhibits a dramatic rise as the sun reaches its apex. Starting at a minimal 1 at 07:00, the index climbs gradually, hitting 3 by 08:00. The real heat arrives at 09:00, when it surges to 6, peaking at a striking 12 from 11:00 to 12:00—an indication to seek shade and protect your skin. As the afternoon progresses, the index begins to descend, dropping to 10 at 13:00, then gradually decreasing to 4 by 15:00. By late afternoon, the UV intensity diminishes, with values falling to 2 at 16:00, and becoming negligible, hitting 1 by 17:00 before fading into the night with a 0 at 18:00 and beyond. Stay informed and shield yourself from those midday rays!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | 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, the UV Index remains consistently high, categorized as extreme, with minimal fluctuation in burn time—averaging just 10 minutes of unprotected sun exposure before sunburn occurs. The high-risk months for UV exposure span from January to March, where the index reaches a peak of 16, and persists notably throughout the year, especially in September and November with values of 15. Residents and visitors are strongly advised to take necessary precautions during these months, including wearing protective clothing, using broad-spectrum sunscreen, and seeking shade whenever possible, as even short periods of exposure can lead to serious 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 |
| Bandung UVI | 15 | 16 | 16 | 15 | 12 | 11 | 11 | 12 | 14 | 15 | 15 | 14 |
| Watuliwung | 15 | 16 | 16 | 14 | 12 | 11 | 12 | 13 | 15 | 15 | 15 | 14 |