Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Batumadeg Kaja, Indonesia, where the tropical climate and high sun exposure can significantly impact skin health. With peak UV levels reaching as high as 11 during midday, awareness of these radiation levels is essential for preventing sunburn and long-term skin damage. The risk of harmful UV radiation especially increases between 10 AM and 2 PM, making it vital to monitor UV levels regularly. Stay informed and protect yourself from the sun's harmful effects while enjoying the beautiful sunny days that Batumadeg Kaja has to offer!
The UV Index for the day presents a clear picture of sun intensity, starting off gentle in the early hours. At 7:00 AM, it begins at a mild 1, increasing to 2 by 8:00 AM. As the sun rises higher, the index climbs rapidly; by 10:00 AM, it reaches 7 and peaks at an intense 11 around 12:00 PM and 1:00 PM. After this zenith, the levels gradually decline, dropping to 9 by 2:00 PM, 6 at 3:00 PM, and settling back to a safe 1 by 5:00 PM. The UV exposure diminishes further, reaching a low of 0 by 7:00 PM. Stay protected 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 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 6 | high | 25 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 |
The UV Index experiences significant fluctuations throughout the year, with notably high values and extreme exposure categories from January to April, and again from July to October. The high-risk months include January through April and July to September, where the UV Index consistently reaches extreme levels of 15, necessitating very short burn times of just 10 minutes. Even during June, with a UV Index of 10, awareness is crucial, as it falls into the very high category with a slightly longer burn time of 15 minutes. Residents and visitors should take proactive measures during these periods to protect their skin, including wearing broad-spectrum sunscreen, protective clothing, and seeking shade whenever possible. As a general rule, stay vigilant with UV safety practices year-round due to the persistently high UV levels observed even in the cooler months.
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 |
| Batumadeg Kaja | 15 | 15 | 15 | 15 | 12 | 10 | 11 | 13 | 15 | 15 | 15 | 14 |