Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Sembalunlawang, Indonesia, where the tropical climate brings both beauty and potential risks. With peak UV levels reaching up to 12 during midday, being aware of these fluctuations can significantly aid in sunburn prevention and promote long-term skin health. As sunlight intensity varies throughout the day, especially between the hours of 10 AM and 2 PM, understanding these UV levels ensures that you can enjoy the stunning landscapes while protecting your skin from harmful effects. Stay informed and take the necessary precautions to enjoy Sembalunlawang safely!
The UV Index rises steadily throughout the morning, starting at a safe 1 at 7:00 AM and gradually climbing to a peak of 12 by noon. This significant increase signifies a risk of harm from unprotected sun exposure, especially between 11:00 AM and 1:00 PM when the intensity reaches its zenith. As the afternoon progresses, the index begins to decline, dropping to 5 by 3:00 PM and further decreasing to 1 by 6:00 PM. By 7:00 PM, the sun's rays become gentle, with a UV Index of 0, making it a safe time to enjoy outdoor activities. Remember to protect yourself during peak hours to enjoy the sun safely!
| 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 | 10 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index remains alarmingly high, consistently categorized as extreme from January to December. January through April exhibit some of the most intense UV levels, peaking at 16 in both February and March, which indicates a burn time of only 10 minutes. Even during May to August, with slightly lower indices ranging from 11 to 13, the risk remains significant due to the persistent exposure category. As the year progresses into September and October, the UV Index returns to 15, signaling continued high risk, before tapering off in November and December at the same level. Given this data, it is crucial for visitors and residents to prioritize sun safety. Always wear sunscreen, protective clothing, and limit sun exposure, especially during the high-risk months of winter and spring when the UV levels are at their peak. Staying vigilant is essential to reduce the risk of skin damage throughout the year.
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 |
| Sembalunlawang | 15 | 16 | 16 | 15 | 13 | 11 | 12 | 13 | 15 | 15 | 15 | 15 |