Last updated: July 2, 2025
In Krajan Rejosari, Indonesia, understanding the UV Index is crucial for protecting your skin and overall health. With daily UV levels rising significantly, especially between 10:00 AM and 1:00 PM when they peak at 11, awareness can be the key to preventing sunburn and long-term skin damage. Given the region's tropical climate, the risk of overexposure is particularly high, making it essential for residents and visitors alike to stay informed about daily UV patterns. Prioritizing UV safety helps ensure a more enjoyable and healthy experience under the sun in this beautiful locale.
The UV Index throughout the day presents a clear pattern of increasing intensity, peaking at 11 from 11:00 to 12:00, indicating a significant risk of harm from unprotected sun exposure. Early risers will find a mild start with a maximum of 1 at 07:00, but as the morning progresses, UV levels surge, reaching 6 by 09:00. The sun’s strength continues to escalate, hitting 10 by 10:00, before peaking at the afternoon maximum of 11. However, as the day winds down, UV exposure rapidly diminishes, plummeting back to 1 by 16:00, and ultimately fading to 0 after 18:00. This pattern highlights the importance of sun protection during peak hours, particularly between 11:00 and 12:00.
| 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 | 10 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 6 | high | 25 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 |
Throughout the year, UV exposure remains particularly high, with January through April experiencing an extreme UV Index consistently at 15. As spring gives way to summer, May sees a slight decrease at 12, followed by a very high index of 10 in June. From July to September, the UV Index fluctuates between 11 and 15, staying in the extreme category during these months. October to December returns to 15, reinforcing that the risk remains high, even in winter. The high-risk months for UV exposure are January, February, March, July, August, September, October, November, and December, where outdoor enthusiasts and residents should take precautions. It is essential for visitors and residents alike to ensure adequate sun protection, such as wearing sunscreen, protective clothing, and seeking shade, especially during peak sun hours, to mitigate the risk of harmful UV exposure.
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 |
| Krajan Rejosari | 15 | 15 | 15 | 14 | 12 | 10 | 11 | 13 | 15 | 15 | 15 | 15 |