Last updated: June 2, 2025
In Batu, Indonesia, understanding the UV Index is crucial for protecting your skin and maintaining overall health. With its tropical Aw climate, residents and visitors face varying UV exposure throughout the day, peaking around noon with indices reaching as high as 9. By being aware of these levels, you can take essential steps to prevent sunburn and reduce long-term skin damage. From morning to afternoon, the sun’s intensity rises swiftly, making it imperative to plan outdoor activities with UV risks in mind to enjoy the beautiful landscapes safely.
As the sun rises, the UV Index begins its climb, starting at a gentle 1 at 07:00, which poses minimal risk to skin. By 08:00, it reaches a moderate 3, signaling a gradual need for sun protection. The intensity peaks between 10:00 and 12:00, soaring to a high of 9 during this period, urging everyone to take caution under the midday sun. After the zenith hour, the index starts to fall, dropping to 7 by 13:00 and continuing its descent to 5 at 14:00. By late afternoon, the UV levels decrease significantly, bouncing back down to a 3 at 15:00, and dwindling to 1 by 17:00. As the sun sets, the UV Index finally falls to 0, marking the end of the day with minimal exposure risk. It's a day that starts with mild sunlight and peaks with strong rays, reminding us to stay vigilant about sun safety during those midday hours!
| 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 | 8 | very high | 15 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 5 | moderate | 30 min |
| 15:00 | 3 | moderate | 30 min |
| 16:00 | 1 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The data indicates significant seasonal variations in UV exposure, with the highest UV Index recorded in February (15) and March (14), both categorized as extreme. High-risk months extend from January through April, where the UV levels are consistently extreme, demanding vigilance and protection against sunburn with a rapid burn time of just 10 minutes. Even as the year progresses into June through August, while the UV Index lowers slightly, it remains in the extreme range during July and August. September to November also showcase extreme levels, emphasizing the need for ongoing sun safety measures. Visitors and residents should apply broad-spectrum sunscreen, wear protective clothing, and seek shade during peak hours, especially from January to April and September to November, to safeguard against harmful UV radiation.
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 |
| Batu | 14 | 15 | 14 | 13 | 12 | 10 | 11 | 13 | 14 | 14 | 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 |